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Questions and Answers
What structure is NOT found within the anterior triangle of the neck?
What structure is NOT found within the anterior triangle of the neck?
Which muscle is responsible for unilateral neck rotation to the opposite side?
Which muscle is responsible for unilateral neck rotation to the opposite side?
Which border is NOT associated with the posterior triangle of the neck?
Which border is NOT associated with the posterior triangle of the neck?
What is the main innervation of the sternocleidomastoid muscle?
What is the main innervation of the sternocleidomastoid muscle?
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Which cervical structure is primarily responsible for elevating the first and second ribs during forced inspiration?
Which cervical structure is primarily responsible for elevating the first and second ribs during forced inspiration?
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Which structure forms a border of the anterior triangle in the neck?
Which structure forms a border of the anterior triangle in the neck?
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Which of the following describes a key feature of the cervical plexus?
Which of the following describes a key feature of the cervical plexus?
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Which of the following structures is found in the posterior triangle of the neck?
Which of the following structures is found in the posterior triangle of the neck?
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Which muscle is primarily responsible for the elevation and retraction of the mandible?
Which muscle is primarily responsible for the elevation and retraction of the mandible?
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Which structure does not contribute to the lateral movement of the mandible?
Which structure does not contribute to the lateral movement of the mandible?
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Which of the following muscles does NOT originate from the sphenoid bone?
Which of the following muscles does NOT originate from the sphenoid bone?
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What is the primary action of the lateral pterygoid muscle?
What is the primary action of the lateral pterygoid muscle?
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Which nerve is responsible for the innervation of all muscles of mastication?
Which nerve is responsible for the innervation of all muscles of mastication?
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Which structure serves as the primary attachment point for the diaphragm on the sternum?
Which structure serves as the primary attachment point for the diaphragm on the sternum?
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What is the primary function of the external oblique muscle?
What is the primary function of the external oblique muscle?
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Which of the following is NOT a bony landmark on the ribs?
Which of the following is NOT a bony landmark on the ribs?
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Which nerves are responsible for the innervation of the external oblique muscle?
Which nerves are responsible for the innervation of the external oblique muscle?
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What structure is housed in the costal groove of the ribs?
What structure is housed in the costal groove of the ribs?
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What is the anatomical significance of the sternal angle?
What is the anatomical significance of the sternal angle?
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Which muscle is responsible primarily for aiding trunk rotation?
Which muscle is responsible primarily for aiding trunk rotation?
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Which of the following components is NOT part of the rectus sheath above the arcuate line?
Which of the following components is NOT part of the rectus sheath above the arcuate line?
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Which parts are included in the inguinal canal?
Which parts are included in the inguinal canal?
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Which muscle originates from the spinous process of C2 and attaches to the inferior nuchal line of the occipital bone?
Which muscle originates from the spinous process of C2 and attaches to the inferior nuchal line of the occipital bone?
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Which innervation is associated with the Serratus Posterior Superior muscle?
Which innervation is associated with the Serratus Posterior Superior muscle?
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What area of the IV discs is affected during spinal extension?
What area of the IV discs is affected during spinal extension?
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Which ligaments become slack during spinal flexion?
Which ligaments become slack during spinal flexion?
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Which muscle group primarily serves to extend and laterally flex the spine?
Which muscle group primarily serves to extend and laterally flex the spine?
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What happens to the intertransverse ligaments during spinal side bending?
What happens to the intertransverse ligaments during spinal side bending?
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Which group of muscles originates from the iliac crest and sacrum?
Which group of muscles originates from the iliac crest and sacrum?
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Which of the following statements regarding the anterior longitudinal ligament during spinal movements is correct?
Which of the following statements regarding the anterior longitudinal ligament during spinal movements is correct?
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Which structure experiences compression during spinal rotation?
Which structure experiences compression during spinal rotation?
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What is the primary role of the posterior longitudinal ligament during spinal extension?
What is the primary role of the posterior longitudinal ligament during spinal extension?
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Which muscle is primarily responsible for depressing the mandible and tensing the skin of the neck?
Which muscle is primarily responsible for depressing the mandible and tensing the skin of the neck?
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What is the main role of the infrahyoid muscles during swallowing?
What is the main role of the infrahyoid muscles during swallowing?
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Which cervical nerves contribute to the formation of the ansa cervicalis?
Which cervical nerves contribute to the formation of the ansa cervicalis?
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Which artery is primarily responsible for supplying the thyroid gland?
Which artery is primarily responsible for supplying the thyroid gland?
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What is the primary source of motor innervation for the diaphragm?
What is the primary source of motor innervation for the diaphragm?
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Which nerve branch provides sensory innervation to the skin of the neck, ear, and shoulder area?
Which nerve branch provides sensory innervation to the skin of the neck, ear, and shoulder area?
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Which muscle is innervated by fibers from C1 via the hypoglossal nerve?
Which muscle is innervated by fibers from C1 via the hypoglossal nerve?
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What anatomical structure does the cervical plexus lie deep to?
What anatomical structure does the cervical plexus lie deep to?
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Which of the following arteries supplies the posterior scalp?
Which of the following arteries supplies the posterior scalp?
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What is the action of the infrahyoid muscles during speech?
What is the action of the infrahyoid muscles during speech?
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Which fascial layer in the neck surrounds the thyroid gland and trachea?
Which fascial layer in the neck surrounds the thyroid gland and trachea?
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What is the primary distinguishing feature of the investing fascia in the neck?
What is the primary distinguishing feature of the investing fascia in the neck?
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Which structures would be considered superficial in the neck?
Which structures would be considered superficial in the neck?
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What defines the medial border of the anterior triangle of the neck?
What defines the medial border of the anterior triangle of the neck?
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Which layer of fascia primarily separates the vertebral column from the viscera of the neck?
Which layer of fascia primarily separates the vertebral column from the viscera of the neck?
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Which anatomical structures are primarily contained within the posterior triangle of the neck?
Which anatomical structures are primarily contained within the posterior triangle of the neck?
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Which combination correctly identifies structures located in the anterior triangle of the neck?
Which combination correctly identifies structures located in the anterior triangle of the neck?
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Which of the following best describes the position of the scalene muscles in relation to the neck's anatomical compartments?
Which of the following best describes the position of the scalene muscles in relation to the neck's anatomical compartments?
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Which of the following best describes the function of the nucleus pulposus in an intervertebral disc?
Which of the following best describes the function of the nucleus pulposus in an intervertebral disc?
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How do the intervertebral discs change in shape from the cervical to the lumbar region?
How do the intervertebral discs change in shape from the cervical to the lumbar region?
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What happens to the annulus fibrosus during spinal flexion?
What happens to the annulus fibrosus during spinal flexion?
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Which pathology is characterized by a forward displacement of a vertebra relative to the one beneath it?
Which pathology is characterized by a forward displacement of a vertebra relative to the one beneath it?
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What is the primary function of end plates in the intervertebral discs?
What is the primary function of end plates in the intervertebral discs?
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Which muscle primarily aids in the depression and protrusion of the mandible?
Which muscle primarily aids in the depression and protrusion of the mandible?
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What is the primary action of the masseter muscle?
What is the primary action of the masseter muscle?
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Which bone does the medial pterygoid muscle originate from?
Which bone does the medial pterygoid muscle originate from?
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Which muscle is involved in retracting the mandible?
Which muscle is involved in retracting the mandible?
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In addition to elevating the mandible, what is another action of the temporalis muscle?
In addition to elevating the mandible, what is another action of the temporalis muscle?
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Which structure serves as the primary point of insertion for the lateral pterygoid muscle?
Which structure serves as the primary point of insertion for the lateral pterygoid muscle?
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The mandibular branch of the trigeminal nerve (V3) innervates which of the following muscles?
The mandibular branch of the trigeminal nerve (V3) innervates which of the following muscles?
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Which anatomical feature is associated with the attachment of the temporalis muscle?
Which anatomical feature is associated with the attachment of the temporalis muscle?
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Which movements collectively involve the muscles of mastication?
Which movements collectively involve the muscles of mastication?
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What structure supports the temporomandibular joint (TMJ) during movement?
What structure supports the temporomandibular joint (TMJ) during movement?
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Which muscles are primarily responsible for the elevation of the mandible?
Which muscles are primarily responsible for the elevation of the mandible?
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What type of joint is the temporomandibular joint (TMJ)?
What type of joint is the temporomandibular joint (TMJ)?
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During mandibular depression, what movement follows the initial rotation of the condyle?
During mandibular depression, what movement follows the initial rotation of the condyle?
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Which ligament is primarily responsible for limiting posterior and lateral displacement of the mandible?
Which ligament is primarily responsible for limiting posterior and lateral displacement of the mandible?
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What characterizes the articular surfaces of the TMJ?
What characterizes the articular surfaces of the TMJ?
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Which muscle is primarily responsible for the retraction of the mandible?
Which muscle is primarily responsible for the retraction of the mandible?
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Which structure separates the TMJ into upper and lower compartments?
Which structure separates the TMJ into upper and lower compartments?
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Which muscle is NOT involved in the depression of the mandible?
Which muscle is NOT involved in the depression of the mandible?
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Which bone provides attachment for the zygomatic arch relevant to masticatory muscles?
Which bone provides attachment for the zygomatic arch relevant to masticatory muscles?
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What type of motion occurs during the initial phase of elevation of the mandible?
What type of motion occurs during the initial phase of elevation of the mandible?
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Which nerve is responsible for providing motor innervation to the muscles of mastication?
Which nerve is responsible for providing motor innervation to the muscles of mastication?
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What is the effect of a lesion in the mandibular nerve (V3)?
What is the effect of a lesion in the mandibular nerve (V3)?
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Which pathway do the maxillary nerve branches take after exiting the skull?
Which pathway do the maxillary nerve branches take after exiting the skull?
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Which area of the tongue receives general sensation from the lingual nerve?
Which area of the tongue receives general sensation from the lingual nerve?
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What kind of sensation loss could occur if there is a lesion in the sensory root of the trigeminal nerve?
What kind of sensation loss could occur if there is a lesion in the sensory root of the trigeminal nerve?
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What cranial nerve provides general sensation to the posterior one-third of the tongue?
What cranial nerve provides general sensation to the posterior one-third of the tongue?
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A lesion affecting V1 would most likely lead to loss of sensation in which area?
A lesion affecting V1 would most likely lead to loss of sensation in which area?
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Which of the following describes the pathway of the ophthalmic nerve (V1)?
Which of the following describes the pathway of the ophthalmic nerve (V1)?
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What is a potential consequence of a lesion in the maxillary nerve (V2)?
What is a potential consequence of a lesion in the maxillary nerve (V2)?
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Which of the following describes the sensory innervation of the maxillary teeth?
Which of the following describes the sensory innervation of the maxillary teeth?
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Study Notes
Anterior Triangle Borders
- Anterior Border: Sternocleidomastoid Muscle (SCM)
- Inferior Border: Mandible
- Posterior Border: Midline of the Neck
Posterior Triangle Borders
- Anterior Border: Sternocleidomastoid Muscle (SCM)
- Posterior Border: Trapezius Muscle
- Inferior Border: Middle third of the Clavicle
Anterior Triangle Contents
- Contains smaller triangles
- Structures include the carotid arteries, internal jugular vein, vagus nerve, thyroid gland, and lymph nodes
Posterior Triangle Contents
- Contains the accessory nerve (CN XI), branches of the cervical plexus, external jugular vein, and muscles such as the scalenes and levator scapulae.
Intervertebral Disc Components and Function
- Nucleus Pulposus: The gel-like core of the disc, consisting of water and collagen fibers. It provides shock absorption and flexibility.
- Annulus Fibrosus: The outer ring of the disc, composed of concentric layers of fibrocartilage. It provides tensile strength and contains the nucleus pulposus.
- End Plates: Thin cartilaginous layers connecting the disc to adjacent vertebral bodies, facilitating nutrient exchange and maintaining disc integrity.
-
Functions:
- Shock Absorption: Cushions vertebrae during movement, absorbing compressive forces.
- Load Distribution: Evenly distributes loads across vertebral bodies, preventing localized stress.
- Movement: Allows for flexion, extension, lateral bending, and rotation between vertebrae.
Intervertebral Disc Shape Variation
- Cervical Region: Discs are smaller and more uniform in height, with greater flexibility, allowing for wider range of motion in flexion and rotation.
- Thoracic Region: Discs are thicker posteriorly, contributing to thoracic cage stability and limiting movement due to rib articulation.
- Lumbar Region: Discs are largest and thicker, especially anteriorly, supporting the weight-bearing demands of the lower back.
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Description
This quiz explores the anatomical structures and borders of the anterior and posterior triangles of the neck. Participants will learn about the key muscles, nerves, and vascular contents located within these important anatomical regions.
