Week 1: Station 7 - The Hyoid Bone, Strap Muscles of the Neck and Cervical Plexus Flashcards
A. Middle pharyngeal constrictor muscle origin
C. Hyoglossus muscle origin
D. Greater Horn
E. Lesser Horn
F. Body of hyoid
G. Stylohyoid ligament.
What are the 4 suprahyoid muscles? (MA DAD SELLS GAVISCON)
- Myolohyoid
- Digastric
- Stylohyoid
- Geniohyoid
What is the nerve supply of the myolohyoid muscle?
Myolohyoid nerve (trigeminal)
What is the nerve supply of the geniohyoid muscle?
Hypoglossal nerve
What two nerves supply the digastric muscles?
- Myolohyoid nerve (trigeminal) [anterior belly]
- Facial nerve [posterior belly]
What nerve supplies the stylohyoid?
Facial nerve
What is the action of the suprahyoid muscles on the mandible and hyoid bone?
Depression of the mandible and elevation of the hyoid bone
What are the 4 infrahyoid muscles? TOSS
T - Thyrohyoid
O - Omohyoid
S - Sternohyoid
S - Sternothyroid
(thanks MT for the mnemonic)
What is the nerve supply of the thyrohyoid?
C1 via the hypoglossal nerve
What is the nerve supply of the omohyoid?
C2, C3
What is the nerve supply of the sternothyroid and sternohyoid muscles?
C2, C3
What is C2, C3 better known as?
Ansa Cervalis
What action do the infrahyoid muscles have on the hyoid bone?
Depression
Stabilisation
during swallowing
What are the vertebral root values of the cervical plexus?
C1 - C5
Between which two muscles does the cervical plexus emerge?
“The cervical plexus is formed in the neck, and lies deep to the sternocleidomastoid muscle, and anterolateral to the levator scapulae and middle scalene muscles.”
What nerve arises from the cervical plexus and travels through the thorax?
Phrenic nerve
also has afferent fibres from pericardium
