Lec 22. MM pt. 2

Question 1

Depressor Anguli Oris

Answer 1

O- body of mandible/oblique line
I- angle of mouth, blends in with orbicularis oris
N- mandibular
A- draws corners of mouth down

Question 2

Depressor Anguli inferioris

Answer 2

O- oblique line
I- Skin + blends into orbicularis oris
N- mandibular
A- depresses lower lip

Question 3

Mentalis

Answer 3

O- alveolar process (mandible)
I- skin of upper chin + lower lip
N- mandibular
A - elevates + protrudes lower lip
(pouting)

Question 4

Platysma

Answer 4

O- deep fascia over ant. deltoid + pec major
I- body of mandible + muscles and fascia + skin surrounding the mouth
N- cervical
A - depresses lower jaw + lip
tenses and ridges skin of the neck

Question 5

Sup. Rectus

Answer 5

O- tendinous ring on post. wall of the orbital cavity
I- Inf. surface of eyeball post. to corneoscleral junction
N- oculomotor
A- raises eye/ cornea upward + medially

Question 6

Inf. Rectus

Answer 6

O- tendinous ring on post. wall of the orbital cavity
I- Inf. surface eyeball post. to corneoscleral junction
N- oculomotor
A- depresses eye down + medially

Question 7

Med. Rectus

Answer 7

O- tendinous ring on post. wall of the orbital cavity
I- med. surface of eyeball post. to corneoscleral junction
N- oculomotor
A- rotates eyeball to face medially

Question 8

Lateral Rectus

Answer 8

O- tendinous ring on post. wall of the orbital cavity
I- lateral surface eyeball post. to corneoscleral junction
N- abducent
A- rotates eyeball cornea face laterally

Question 9

Sup. Oblique

Answer 9

O- post. wall of the orbital cavity
I- passes through fascia pulley, attached to Sup. surface of eyeball beneath Sup. rectus
N-trochlear
A- rotates eyeball to look down + laterally

Question 10

Inf. Oblique

Answer 10

O- floor of the orbital cavity
I- lateral surface of eyeball deep to lat. rectus
N- oculomotor
A- rotates eyeball cornea looks upward + laterally