Dissection 9 - Neck II

Anterior and posterior bellies of digastric m.

Has a tendon connecting the two bellies; Involved in jaw depression

Brachiocephalic trunk

Right most branch off aortic arch; Branches into. R CCA and R subclavian a.

Cervical sympathetic trunk

Paired sympathetic trunk that runs up to the base of the skull; Path for sympathetics to travel

Clavicle

What is the highlighted bone?

Dens

Superior projection of C2 vertebrae; articulates with C1 allowing for lateral rotation of the head

Foramen magnum

Opening in the occipital bone where the spinal cord and vertebral a. pass through to enter the brain; Spinal root of accessory n. go through as well

Geniohyoid

Muscle that runs from genu to hyoid; Deep to mylohyoid (C in image)

Hyoglossus

Extrinsic tongue m involved in depression and retraction of the tongue

Inferior thyroid a.

Most medial branch of the thyrocervical trunk (off subclavian a.); Ascends to the thyroid

Manubrium

What part of the sternum is highlighted?

Mylohyoid raphae

Line between the L and R mylohyoid m.

Posterior triangle

Bordered by SCM, Trapezius and Clavicle

Subclavian v.

Drains into brachiocephalic v.

Recurrent laryngeal n.

Branch of CN X; R side loops under R subclavian; L side loops under ligamentum arteriosum; Carries SS, SM, and parasympathetics to infraglottic area

Retropharyngeal space

Space between the pretracheal and prevertebral fascia

Sternal angle

Joint between sternal body and manubrium

Sternal body

What is the highlighted structure called?

Sternum

Manubrium + Body + Xiphoid process = ?

Styloglossus

Extrinsic tongue m. involved in elevation and retraction

Stylohyoid

Suprahyoid m. that runs from styloid process to hyoid; It straddles the digastric tendon (B in image)

Subclavian a.

L a. branches off directly from aortic arch; R a. branches off brachiocephalic trunk

Submandibular duct

Courses on hyoglossus; Crosses superior to lingual n.

Submandibular gland

Located around angle of mandible; Secretes saliva which exits into the oral cavity through the sublingual caruncle

Suprascapular a.

Most lateral branch off the thyrocervical trunk

Thoracic duct

Empties lymph (except that of the R quadrant) into the junction between the L IJV and L subclavian v.

Thyrocervical trunk

Second branch off the subclavian a.TTra

Transverse cervical a.

Middle branch of thyrocervical trunk; Courses laterally across the anterior scalene m.

Vertebral a.

First branch off the L and R subclavian a.; Runs through transverse foramen of C1-6

Xiphoid process

What is the purple structure called?