Neck II Flashcards
The cervical plexus is formed by ___.
The anterior rami of cervical nerves C1-C4
branches of which n. innervate the infrahyoid m.’s?
Cranial #?
Ansa cervicalis (C1-C3)
Which nerve innervates the diaphragm? Cranial #?
Phrenic n. (C3-C5)
What are the 8 branches of the external carotid a.?
Also include the branch off the first branch.
- Superior Thyroid a. (superior laryngeal a. branch)
- Ascending pharyngeal a.
- Lingual a.
- Facial a.
- Occipital a.
- Posterior auricular a.
- Maxillary a.
- Superficial temporal a.
Mneumonic: Some Anatomists Like Freaking Out Poor Med Students
What n.’s correspond to CNX, CNXI, CNXII?
CNX: Vagus n.
CNXI: Spinal accessory n.
CNXII: Hypoglossal n.
What are the 4 suprahyoid m.’s and 4 infrahyoid m.’s?
Suprahyoid: Stylohyoid, Digastric, Mylohyoid, Geniohyoid
Infrahyoid: Omohyoid, Thyrohyoid, Sternohyoid, Sternothyroid
What 2 structures pass through together lateral to the anterior scalene m.?
The brachial plexus and the subclavian a. (which from medial of the anterior scalene m. deep to the scalene m. and lateral to the scalene m., defining the 3 parts of the subclavian a. (like the axilary a. w/ pectoralis minor m.))
What are the branches of the Subclavian a.?
1st part of a.:
Vertebral a., which goes through transverse foramen of cervical vertebrae,
Thyrocervical trunk which becomes: Inferior Thyroid a., Transverse cervical a., Suprascapular a.
Internal thoracic a.
2nd part of a.:
Costocervical trunk which becomes: Deep cervical a., Superior intercostal a.
Describe the direction of the vagus and phrenic n.’s
Vagus n. (CNX) descends along carotids,
Phrenic n. decends along the surface of the anterior scalene m. before passing deep to the first rib.
What structures are enclosed in the cartoid sheath?
- Common (and/or internal) coratid a.
- Internal jugular v.
- Vagus n.
What is the result after severing the recurrent laryngeal n.?
Hoarseness of voice due to paralysis of laryngeal m.’s
