Human Architecture 2 Post-Lab Practice Questions

What are the boundaries of the posterior triangle of the neck?

SCM, trapezius, and clavicle

What are the subdivisions of the anterior triangle of the neck?

Muscular triangle, mandibular triangle, carotid triangle, submental triangle

What is the modality of the cutaneous branches of the cervical plexus?

GSA only

What muscle shares innervation with the SCM?

Trapezius

Name all layers of the deep neck fascia?

3 main layers (from superficial to deep):

1. investing layer: surrounds the entire neck and forms the capsules of the parotid and submandibular glands

2. pretracheal layer: starts at the level of the hyoid, encloses the visceral compartment (includes thyroid gland, larynx, trachea, esophagus) and extends into the thorax where it blends into the pericardium

   1. Buccopharyngeal fascia is the posterior part of the pretracheal fascia, it extends into the thorax

3. prevertebral layer: surrounds the vertebral compartment (includes the ventral and dorsal deep neck muscles and vertebral column)

Where is the retropharyngeal space and what is the significance of it?

The retropharyngeal space is a potential space between the buccopharyngeal and prevertebral, and it opens inferiorly into the posterior mediastinum, so retropharyngeal abscesses and infections can spread from the neck to the posterior mediastinum through the retropharyngeal space

What spinal nerves form ansa cervicalis?

C1-C3

What structures pass through the gap between the anterior and middle scalene muscles?

Roots of the brachial plexus and the subclavian artery (phrenic nerve runs on top of the anterior scalene)

What triangle(s) contains the hypoglossal nerve?

Submandibular triangle and carotid triangle

What is the content of the carotid triangle?

Common carotid artery, external and internal carotid arteries, internal jugular vein, vagus nerve, hypoglossal nerve, superior and inferior roots of ansa cervicalis, transverse cervical nerve