/
Facial and Cranial Muscles Anatomy
Save to my account
Sign up
Facial and Cranial Muscles Anatomy
Facial and Cranial Muscles Anatomy
Study
1
Question
What is the Orbicularis oculi?
Answer
It is a circular muscle around the orbital opening.
2
Question
What are the parts of the Orbicularis oculi?
Answer
Orbital, palpebral, and lacrimal.
3
Question
What is the Orbicularis oris?
Answer
It is a circular muscle that surrounds the mouth opening.
4
Question
What is the action of the Orbicularis oris?
Answer
It compresses the lips together for kissing and is very important during articulation.
5
Question
What is the Buccinator?
Answer
It is the muscle of the cheeks.
6
Question
What is the action of the Buccinator?
Answer
It empties the vestibule of the mouth by compressing the cheeks against the teeth.
7
Question
What is the nerve supply of the muscles of the face?
Answer
All the muscles of the face are supplied by the Facial Nerve.
8
Question
Identify muscle A and mention its nerve supply.
Answer
Muscle A is the Orbicularis oculi; its nerve supply is the Facial nerve.
9
Question
What is the origin of the Facial Artery?
Answer
The origin of the Facial Artery is the external carotid artery in the neck.
10
Question
What are the divisions of the External Ear?
Answer
Tympanic Membrane (Ear Drum). The tympanic membrane lies at the medial end of the external auditory meatus.
11
Question
What is the ossicle attached to the tympanic membrane?
Answer
The handle (manubrium) of the malleus, the first bone of the ossicular chain of the middle ear, is visible.
12
Question
How does air reach the Middle Ear?
Answer
Air reaches the Middle Ear from the nasopharynx via the auditory Eustachian tube and also spreads into the mastoid air cells.
13
Question
What does the Middle Ear contain?
Answer
It contains the auditory ossicles and the muscles that attach them to the middle ear.
14
Question
Which nerve runs along the walls of the tympanic segment?
Answer
The tympanic segment of the facial nerve runs along its walls.
15
Question
What is the nerve supply of stapedius and tensor tympani muscles?
Answer
They are innervated by branches of trigeminal and facial nerves respectively.
16
Question
What is the action of the stapedius and tensor tympani muscles?
Answer
Their action is to prevent excessive vibration of the tympanic membrane and the stapes respectively.
17
Question
What are the three coats of the eyeball?
Answer
Outer fibrous, middle vascular, and inner nervous.
18
Question
What is responsible for the reflection of light on the retina?
Answer
A biconvex lens is responsible for the reflection of light on the retina.
19
Question
What emerges from the eyeball?
Answer
The optic nerve emerges from the eyeball.
20
Question
What are the Recti muscles?
Answer
Superior rectus, inferior rectus, medial rectus, lateral rectus.
21
Question
What are the Oblique muscles?
Answer
Superior oblique and inferior oblique.
22
Question
What is the Eyelid muscle?
Answer
Levator palpebrae superioris.
23
Question
What are the Extraocular Muscles?
Answer
The muscles surrounding and controlling the eye, including the recti and oblique muscles.
24
Question
What is the Tendinous ring?
Answer
It surrounds the optic canal and a part of the superior orbital fissure. It gives origin to the 4 rectus muscles.
25
Question
What is the action of the superior rectus muscle?
Answer
Elevation and adduction of the eyeball.
26
Question
What is the action of the inferior rectus muscle?
Answer
Depression and adduction.
27
Question
What is the action of the medial rectus muscle?
Answer
Adduction.
28
Question
What is the action of the lateral rectus muscle?
Answer
Abduction.
29
Question
What is the origin and action of the superior oblique muscle?
Answer
Origin: roof of the orbit; Action: depression and abduction.
30
Question
What is the origin and action of the inferior oblique muscle?
Answer
Origin: floor of the orbit; Action: elevation and abduction.