Head and Neck Muscles, Bones, Blood Vessels, and Nerves Flashcards
Sternohyoid: Origin and Innervation
- Origin: Posterior surface of the sternum and inner clavicle
- Innervation: Anterior rami of the spinal nerves C1-C3 via the ansa cervicalis of the cervical plexus
Sternothyroid: Origin and Innervation
- Origin: Posterior surface of the sternum
- Innervation: Anterior rami of the spinal nerves C1-C3 via the ansa cervicalis of the cervical plexus
Omohyoid: Origin and Innveration
- Origin: Superior border of the scapula near the suprascapular branch
- Innervation: Anterior rami of the spinal nerves C01-C03 via the ansa cervicalis of the cervical plexus
Which head/ neck muscles of the cat are innervated by the anterior rami of spinal nerves C01-C03 via the ansa cervicalis of the cervical plexus?
Sternohyoid, sternothyroid, and omohyoid
What muscles make up the infrahyoid muscle group?
Sternocleidomastoid (sternomastoid + cleidomastoid), sternohyoid, omohyoid, sternothyroid, and thyrohyoid
Which muscles are deep to the sternohyoid?
Sternothyroid and thyrohyoid
Which two muscles almost look like they’re one straight line?
Sternothyroid and thyrothyoid
What muscles are innervated by the facial nerve (CN07)?
The stylohyoid and buccinator
Stylohyoid: Origin and Innervation
- Origin: Lateral surface of the styloid process
- Innervation: Stylohyoid branch of the facial nerve (CN07 AKA CN VII)
Buccinator: Origin and Innervation
- Origin: Alveolar process of the maxilla and mandible
- Innervation: Buccal branch of the facial nerve (CN07 AKA CN VII)
Which is the only muscles to run perpendicular to the long axis of the cat unlike the majority of the other neck muscles which run along the long axis of the cat?
Stylohyoid, which is right in between the long portion of the neck and the beginning of the head
Where is omohyoid located?
Superficial and next to the sternohyoid
The olfactory nerve is which number cranial nerve?
CN I
The optic nerve is which number cranial nerve?
CN II
The oculomotor nerve is which number cranial nerve?
CN III
The trochlear nerve is which number cranial nerve?
CN IV
The trigeminal nerve is which number cranial nerve?
CN V
The abducens nerve is which number cranial nerve?
CN VI
The facial nerve is which number cranial nerve?
CN VII
The vestibulocohlear nerve is which number cranial nerve?
CN VIII
The glossopharyngeal nerve is which number cranial nerve?
CN IX
The vagus nerve is which number cranial nerve?
CN X
The accessory nerve is which number cranial nerve?
CN XI
The hypoglossal nerve is which number cranial nerve?
CN XII
Which cranial nerve is the only one to come off more in the center of the brain stem vs from the side?
The last one, cranial nerve XII, the hypoglossal nerve?
Which nerve has 3 different tracts?
The trigeminal nerve (CN V)
Which nerve looks like a net on the brain stem
The accessory nerve (CN VI)
What is the name of CN I?
Olfactory nerve
What is the name of CN II?
Optic nerve
What is the name of CN III?
Oculomotor nerve
What is the name of CN IV?
Trochlear nerve
What is the name of CN V?
Trigeminal nerve
What is the name of CN VI?
Abducens nerve
What is the name of CN VII?
Facial nerve