L25. Gross Anatomy of the Neck Triangles

What are the superior anterior borders of the neck?

Superior Nuchal Line, Mastoid Process
Inferior border of mandible (correct)
Vertebra CVII
Manubrium of the sternum and the clavicle

What are the superior posterior borders of the neck?

Superior Nuchal Line, Mastoid Process (correct)
Manubrium of the sternum and the clavicle
Vertebra CVII
Inferior border of mandible

What are the inferior anterior borders of the neck?

Inferior border of mandible
Manubrium of the sternum and the clavicle (correct)
Vertebra CVII
Superior Nuchal Line, Mastoid Process

What does the investing layer of the deep cervical fascia contain?

Cutaneous nerves of cervical plexus, SCM, Trapezius, Infrahyoid, Suprahyoid muscles (A) Signup and view all the answers

What does the pre vertebral layer of the deep cervical fascia contain?

Vertebral column, muscles of the back (B) Signup and view all the answers

What does the pretracheal layer of the deep cervical fascia contain?

Viscera of the neck, pharynx, esophagus (A) Signup and view all the answers

The pre-vertebral fascia is divided into 2 layers, with the anterior layer being called what?

Alars fascia (B) Signup and view all the answers

What is the name of the fascia that encases the pharynx and esophagus posteriorly?

Buccopharyngeal fascia (A) Signup and view all the answers

What are the borders of the posterior triangle?

Anterior: Posterior border of SCM | Posterior: Anterior border of Trapezius | Inferior: Clavicle | Roof: Deep cervical fascia | Floor: Muscles of the neck (A) Signup and view all the answers

What does the carotid sheath of the deep cervical fascia contain?

Internal jugular vein, common carotid artery, vagus nerve (D) Signup and view all the answers

Pre-tracheal spae

Investing and pre-tracheal (B) Signup and view all the answers

Retropharyngeal space

Buccopharyngeal and pre-vertebral (A) Signup and view all the answers

Pre-vertebral space

2 layers of the pre-vertebral layers (B) Signup and view all the answers

Contents of the superficial fascia

Platysma, external jugular vein, anterior jugular vein (C) Signup and view all the answers

Platysma muscle: Inferior attachment, superior attachment, innervation, function

Inferior attachment: superficial fascia of thorax | Superior attachment: Medial fibers: Mandible, Lateral fibers: Muscles around Mouth | Innervation: CN VII | Function: Tense the skin of the neck and moves lower lip and corners of mouth down (B) Signup and view all the answers

SCM: Origin, Insertion, Innervation, Function

Origin: Clavicular head - clavicle, Sternal head: manubrium of the sternum | Insertion: Superior nuchal line and mastoid process Innervation: Motor: CN XI Sensory: C2-C4 Function: Turns head to same side, rotates head to opposite side (A) Signup and view all the answers

Trapezius: Origin, Insertion, Innervation, Function

Origin: Superior nuchal line, external occipital protuberance, ligamentum nuchae, spinous process of C7 to T12 | Insertion: Lateral 1/3 of Clavicle, Acromion and the spine of the Scapula | Innervation: Motor: CN XI Sensory: C3-C4 Function: Rotates the scapula (B) Signup and view all the answers

What are the four sub triangles of the anterior triangle?

Submandibular, carotid, muscular, submental (B) Signup and view all the answers

Locate the four sub triangles of the anterior triangle of the neck

Green: Submandibular Pink: Submental Blue: Carotid Purple: Muscular Signup and view all the answers

What group of muscles are located in the muscular triangle of the anterior triangle?

Infrahyoid (Strape) muscles (C) Signup and view all the answers

T or F: The superior belly of the omohyoid muscle passes through the posterior triangle

False (B) Signup and view all the answers

Origins and insertions for the two bellies of the omohyoid bone

SUPERIOR BELLY: Origin: Intermediate tendon | Insertion: Hyoid Bone. INFERIOR BELLY: Origin: Scapula | Insertion: Intermediate Tendon (A) Signup and view all the answers

Origin, Insertion and Function for STERNOHYOID bone

Origin: Medial end of Clavicle and Sternum | Insertion: Hyoid bone | Function: Depresses hyoid bone after swallowing (C) Signup and view all the answers

Function of the omohyoid muscle

Depress the hyoid bone Signup and view all the answers

Label the INFRAHYOID MUSCLES

Blue: Omohyoid Green: Sternohyoid Red: Thyrohyoid Yellow: Sternothyroid Signup and view all the answers

Origin, Insertion, and Function of Thyrohyoid muscle

Origin: Oblique line of thyroid cartilage | Insertion: Greater Horn of hyoid bone | Function: Depresses hyoid bone when thyroid cartilage is fixed (B) Signup and view all the answers

Origin, Insertion and Function of the Sternothyroid muscle

Origin: Manubrium of sternum | Insertion: Oblique line of thyroid cartilage | Function: Depresses the larynx (thyroid cartilage) (A) Signup and view all the answers

Innervation for INFRAHYOID MUSCLES

Ansa cervicalis (C1-C3) with the exception of the THYROHYOID muscle which is innervated by the C1 fibers that carry CN XII Signup and view all the answers