Exam 1 Relationships Flashcards
The hyoid bone has no Bony articulations and is stabilized by:
Via suprohyoid and infra hyoid muscles
Carotid bodes can be found and contain:
Where the common carotid bifurcates (C3) and contain chemoreceptors; Chemoreceptors responds to changes in oxygen tension
Where is the carotid sinus found?
Base of int. carotid artery. Contains baroreceptors which sense pressure changes (BP response)
External carotid is:
More anterior than int. carotid and is outside SCM (Internal is directly under).
Superior thyroid artery parallels:
External laryngeal Nerve
Superior laryngeal artery parallels:
Internal laryngeal nerve; run in thyrohyoid membrane (pierces)
Compared to the post. Digastric and hyoglossus muscle the Lingual artery is:
Deep
What never travels with the lingual N?
Lingual artery
The facial artery is deep to the:
Post. digastric and stylohyoid
The submittal artery lies on:
The mylohyoid, and parallels here to mylohyoid nerve (Branch V3)
The facial artery parallels:
The facial vein. But the vein is more superficial (over submandibular gland)
The ascending pharyngeal artery comes off at:
C3 bifurcation. Lies deep to external carotid
Where does the occipital artery travel to?
Posterior Skull. (Hypoglossal nerve crosses occipital and lies on lingual artery.)
The hypoglossal turns anterior at:
the Occipital artery. It goes under the stylohyoid and posterior belly of digastric, lies on hyoglossus, passes deep to mylohyoid
The carotid sheath contains:
Investing fascia around the common carotid artery (which splits into external and internal), Internal carotid, Jugular vein, CN X (vagus) and lymph nodes
Does the internal jugular vein have a bifurcation?
No.
What makes up the retromandibular vein
Superficial temporal and maxillary vein
Describe the pathway of veins leading to the internal jugular
Anterior retromandibular + facial leads to the common facial which leads to the internal jugular
Posterior retromandibular and the posterior auricular vein make up the
External jugular
Where does the Accessory Cranial Nerve exit?
CN XI exits the jugular foramen with the internal jugular, IX, and X
The carotid is mostly covered by the:
SCM
What two muscles the the Accessory Nerve innervate?
SCM and Trapezius
The Ansa Cervicalis is anterior to:
Internal jugular vein (Lying on top of internal jugular vein)
Superior root of Ansa cervicalis is:
Superior root = C1 ( Thyrohyoid, geniohyoid)
Inferior root of Ansa Cervicalis is:
C2 and C3: Innervates Strap Muscles (Sternohyoid, Sternothyroid, Omohyoid, thyrohyoid)
Stylohyoid muscle parallels the:
Posterior digastric, and lies anterior
What wraps around the digastric tendon and inserts into the hyoid?
Stylohyoid muscle
The submandibular gland has two parts, Superficial and deep. Which part is above the Mylohyoid?
Deep
The Hypoglossal N. XII can be found in which triangle?
The Carotid triangle. Turns and goes under posterior digastric and lies on top of hyoglossus. Then goes under mylohyoid
Which nerve comes out from under the mandible, crosses submandibular triangle and lies on top of Mylohyoid; and parallels the submandibular artery?
The mylohyoid Nerve (Branch of V3)
What emerges between the anterior and middle scalene?
The Brachial plexus and subclavian artery (3rd part). Subclavian artery is deep to brachial plexes
What lies on top of the anterior scalene?
The Phrenic C3-C5, passes down and lies on top of the anterior scalene
What emerges through the middle scalene?
The dorsal scapular nerve C5, Long thoracic nerve, C5-C7
The dorsal scapular will emerge superior to the:
Suprascapular N.
Cutaneous branches of cervical plexus emerge from:
Posterior SCM
What triangle is the Ansa Cervicalis in?
Carotid Traingle
The Lesser occipital C2 (Part of sensory to cervical plexus) parallels:
Posterior border of SCM
The Great auricular C2, C3 (Part of sensory to cervical plexus) emerges from:
Behind the SCM
Transverse cervical C2 C3 (Part of sensory to cervical plexus) crosses:
The SCM; provides sensory skin over anterior triangle
Supraclavicular C3, C4 (Part of sensory to cervical plexus) supplies:
Upper chest and shoulder
What is the Motor of the Cervical Plexus C1-C3:
Ansa Cervicali Superior root Anterior C1 (Catches a ride with hypoglossal n) Inferior root Posterior, C2-3
What are the Arteries of the Posterior Triangle?
- Subclavian: Emerges between anterior and middle scalenes
- Occipital: Branch of external carotid
- Transverse cervical: Superior and parallel to clavicle off of thyrocervical trunk
- Suprascapular: Posterior and parallel to Clavicle comes off of thyrocervical trunk
- Dorsal Scapular: Branch of transverse cervical, parallels after branches. Rises from subclavian artery
External jugular Vein:
Comes out of parotid gland and crosses SCM; dumps into subclavian Vein with great auricular on top of SCM
Greater horn of hyoid:
Hyoglossus, Middle constrictor PA3
Lesser horn of Hyoid:
Stylohyoid ligament PA2
Posterior triangle veins that don’t parallel their artery:
Transverse cervical vein
Occipital vein
External vein
Suprascapular vein
