Podcast
Questions and Answers
Which group of muscles are considered part of the Intrinsic Deep Muscles?
Which group of muscles are considered part of the Intrinsic Deep Muscles?
- Interspinales and Intertransversarii
- Levator costarum and Multifidus
- Suboccipital Triangle muscles
- Semispinalis and Rotatores (correct)
What is the primary action of the muscles in the Suboccipital Triangle?
What is the primary action of the muscles in the Suboccipital Triangle?
- Lateral flexion and rotation of the head
- Extension and lateral flexion of the head
- Rotation and extension of the head (correct)
- Flexion and abduction of the head
Which nerve innervates the muscles in the Suboccipital Triangle?
Which nerve innervates the muscles in the Suboccipital Triangle?
- Facial nerve
- Spinal Accessory nerve
- Vagus nerve
- Suboccipital nerve (correct)
Injuries to the Vertebral Column can include all of the following EXCEPT:
Injuries to the Vertebral Column can include all of the following EXCEPT:
What is a risk associated with dislocations of the cervical vertebrae without fractures?
What is a risk associated with dislocations of the cervical vertebrae without fractures?
Which muscle group is responsible for moving the spine between adjacent vertebrae?
Which muscle group is responsible for moving the spine between adjacent vertebrae?
Which muscle group is primarily responsible for the downward rotation of the scapula?
Which muscle group is primarily responsible for the downward rotation of the scapula?
Which muscle originates from the spinous processes of T2-T5 vertebrae?
Which muscle originates from the spinous processes of T2-T5 vertebrae?
What is the primary action of the muscle originating from the spinous process of C7-T1 vertebrae?
What is the primary action of the muscle originating from the spinous process of C7-T1 vertebrae?
Which nerve innervates the muscle that inserts into the floor of the bicipital groove of the humerus?
Which nerve innervates the muscle that inserts into the floor of the bicipital groove of the humerus?
Which muscle is deep to trapezius and superior to rhomboid major?
Which muscle is deep to trapezius and superior to rhomboid major?
From which vertebrae does the muscle with an insertion at the superior part of the medial border of scapula originate?
From which vertebrae does the muscle with an insertion at the superior part of the medial border of scapula originate?
Which group of muscles in the back are innervated by the posterior rami of spinal nerves?
Which group of muscles in the back are innervated by the posterior rami of spinal nerves?
Injuries to the vertebral column may affect which group of muscles that play a role in maintaining posture?
Injuries to the vertebral column may affect which group of muscles that play a role in maintaining posture?
Which muscle is part of the suboccipital triangle?
Which muscle is part of the suboccipital triangle?
Which muscles are mainly responsible for retraction and upward rotation of the scapula?
Which muscles are mainly responsible for retraction and upward rotation of the scapula?
Which group of muscles in the back receive nerve supply mainly from anterior rami of cervical nerves?
Which group of muscles in the back receive nerve supply mainly from anterior rami of cervical nerves?
Which muscles are deep to the Trapezius and extend from the neck vertebrae to the medial superior scapula?
Which muscles are deep to the Trapezius and extend from the neck vertebrae to the medial superior scapula?
Study Notes
Muscles of the Vertebral Column
- Rhomboid Minor:
- Origin: Spinous process of C7-T1 vertebrae
- Insertion: Medial border of scapula, root of the spine
- Actions: Elevates medial border of scapula, downward rotation of scapula
- Innervation: Dorsal Scapular Nerve (C4-5)
- Rhomboid Major:
- Origin: Spinous Process of T2-T5 vertebrae
- Insertion: Medial border of scapula (inferior 2/3)
- Actions: Retracts scapula, downward rotation of scapula
- Innervation: Dorsal Scapular Nerve (C4-5)
- Latissimus Dorsi:
- Origin: Spinous process of T6-L5 & S1-2 vertebrae, Thoracolumbar Fascia, Inferior Ribs, Posterior iliac crest of pelvis
- Insertion: Floor of bicipital groove of humerus
- Actions: Extends, adducts, medially rotates humerus, downward rotation of scapula
- Innervation: Thoracodorsal Nerve C6-8
- Serratus Posterior:
- Origin: Lig. Semispinalis (thoracis, cervicis, capitis)
- Actions: Rotation, extension & lateral flexion between adjacent vertebrae
- Innervation: Dorsal rami of spinal nerves
- Rotatores:
- Origin: Transverse process of inferior vertebra
- Insertion: Spinous process of superior vertebra
- Actions: Rotation, extension & lateral flexion between adjacent vertebrae
- Innervation: Dorsal rami of spinal nerves
Intrinsic Deep Muscles
- Transversospinales Group:
- Rotatores longus
- Rotatores brevis
- Semispinalis
- Multifidus thoracis cervicis capitis
- Interspinales Muscles
- Intertransversarii Muscles
- Levator costarum Muscles
Vertebral Column Injuries
- Disk Herniation
- Spinal Cord Injury
- Joint Dislocations
- Vertebral Fracture
- Ligament / Muscle / Tendon Tears
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Description
Test your knowledge on the intrinsic deep muscles of the spine, including Semispinalis, Multifidus, and Rotatores. Learn about their actions, innervation, and muscle fiber orientation between adjacent vertebrae.
