Flashcards in Suprahyoid/Extrinsic Tongue Muscles Deck (28)
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1
Which muscle contains an intermediate tendon that is strapped to the hyoid bone by a fibrous loop?
Digastric
2
What are the origins of the digastric muscle?
Anterior Belly: Digastric Fossa
Posterior Belly: Mastiod Process
3
What is the nerve innervation of the digastric?
Anterior Belly: Cervical branch of Facial Nerve (CN VII)
Posterior Belly: Nerve to Mylohyoid (Off of CN V)
4
What is the function of digastric?
1) Elevates the hyoid bone for swallowing
2) Depresses the Mandible when the hyoid is fixed
5
Which muscle is directly deep to the digastric?
Mylohyoid
6
Which suprahyoid muscle has an attachment point on a median raphe to the contralateral muscle of the same name?
Mylohyoid
7
What is the nerve innervation of the Mylohyoid Muscle?
Nerve to Mylohyoid (From CN V)
8
What is the function of the Mylohyoid?
Elevates the hyoid bone and the floor of the mouth
9
What is the origin of the mylohyoid?
Mylohyoid line of the mandible
10
What is the insertion point of the mylohyoid?
1) Body of the hyoid bone
2) Median Raphe
11
Which muscle takes its origin from the inferior mental spine?
Geniohyoid
12
Which muscle takes its origin from the superior mental spine?
Genioglossus
13
What is the nerve innervation of the Geniohyoid muscle?
C1 fibers through the hypoglossal nerve
14
What is the nerve innervation of the Genioglossus muscle?
Hypoglossal nerve (CN XII)
15
Which muscle is the largest muscle of the tongue?
Genioglossus
16
What muscle has a function to draw the tongue forward and protrude the tip of the tongue (Stick the tongue out)?
Genioglossus
17
Which muscle has its origin from the body and greater horn of the hyoid bone from its upper surface?
Hypoglossus
18
What is the nerve innervation of the hypoglossus?
Hypoglossal nerve (CN XII)
19
What is the function of the hypoglossus?
drawing the tongue downward (as to say "ah")
20
There is an anatomical variation what will take its origin from the lesser horn of the hyoid bone. What is this muscular variation called and what muscle does it originate from?
-Chondroglossus
-It is a variation from the hypoglossus
21
What two muscles take their origins from the styloid process?
1) Styloglossus
2) Stylohyoid
22
Which muscle has an insertion point on the sides of the tongue?
Styloglossus
23
What is the function of the styloglossus?
Draws the tongue upward and backward
24
What is the nerve innervation of the styloglossus?
Hypoglossal Nerve (CN XII)
25
What is the insertion point of the stylohyoid muscle?
Body of the hyoid bone?
26
What is the nerve innervation of the stylohyoid muscle?
Facial Nerve (CN VII)
27
What is the function of the stylohyoid muscle?
elevates the hyoid bone and tongue
28
