Cervical Plexus — Flashcards

Flashcard 1: The ansa cervicalis arises from _____-C3 nerve roots

Answer: C1

Flashcard 2: Modifications of deep cervical fascia:The _____ part of the pretracheal fascia encloses the infrahyoid muscles

Answer: muscular

Flashcard 3: Irritation of the phrenic nerve can refer pain to the _____ shoulder region (Kehr sign) and cause hiccups

Answer: C3-C5

Flashcard 4: Name the nerve loop in the cervical plexus that supplies the infrahyoid muscles (sternohyoid, sternothyroid, and omohyoid).

Answer: Ansa cervicalis

Extra: The ansa cervicalis is a loop of nerves (C1-C3) that is part of the cervical plexus. It consists of a superior root (C1) and an inferior root (C2-C3) and supplies the infrahyoid muscles (sternohyoid, sternothyroid, and omohyoid). Note that the thyrohyoid is supplied by C1 fibers via the hypoglossal nerve, not the ansa cervicalis directly.

Flashcard 5: The cervical plexus is made up of the anterior rami of which spinal nerves?_____

Answer: C1-C4

Flashcard 6: The transverse cervical nerve is formed by fibres from _____ and C3 roots of the cervical plexus

Answer: C2

Flashcard 7: The structure marked is the _____.

Answer: ansa cervicalis

Flashcard 8: What are the contents of the posterior triangle (occipital and subclavian triangles) of the neck? (6)

Answer: 1. Spinal accessory nerve (CN XI) 2. Brachial plexus (trunks) 3. Cervical plexus (cutaneous branches) 4. Subclavian artery (3rd part) 5. Transverse cervical and suprascapular vessels 6. External jugular vein and lymph nodes (occipital and supraclavicular)

Flashcard 9: The image shows a _____ cervical vertebra, which could be seen at the _____ levels

Answer: typical

Flashcard 10: What are the components of the cruciform ligament of the atlas: _____, Inferior longitudinal band, and Transverse ligament

Answer: Superior longitudinal band