Last update:

Medial Pterygoid Muscle – Attachments, Actions & Innervation

image descriptionMedial Pterygoid Muscle

Mastication muscles
Medial Pterygoid Muscle attached to the skull with other mastication muscles
Medial Pterygoid Muscle attached to the skull with other mastication muscles
Medial Pterygoid Muscle attached to the skull alone
1
2
3
4

image descriptionAttachments of Medial Pterygoid Muscle: Origin & Insertion

Origin: (proximal attachments):
a. Superficial head: tuberosity of maxilla.
a. Deep head: medial surface of lateral pterygoid plate and palatine bone.

Insertion: (distal attachments):
Medial surface of ramus and angle of mandible.

Medial Pterygoid Muscle attached to the skull with other mastication muscles
Medial Pterygoid Muscle attached to the skull alone
Medial Pterygoid Muscle - Origin and Insertion
1
2
3

Actions of Medial Pterygoid Muscle on the mandible:

Together:

a. image descriptionElevate mandible.

Mandible elevation (1)
Mandible elevation (1)
Mandible elevation (3)
Mandible elevation (4)
Mandible elevation (5)
Mandible elevation (1)

b. image descriptionProtract (or protrude) mandible.

Mandible protraction (1)
Mandible protraction (2)
Mandible protraction (3)
Mandible protraction (4)

Individually: they image descriptionmove the mandible side to side.

Mandible movement (1)
Mandible movement (2)
Mandible movement (3)
Mandible movement (4)
Mandible movement (5)

Nerve to Muscle and its Spinal Segment:

Mandibular branch of trigemminal nerve (V).

Overview:

Medial Pterygoid Muscle - Test yourself
Medial Pterygoid Muscle - Test yourself 1
Medial Pterygoid Muscle - Test yourself 2
Medial Pterygoid Muscle - Test yourself 3
Medial Pterygoid Muscle - Test yourself 4
Medial Pterygoid Muscle - Test yourself 5
Medial Pterygoid Muscle - Test yourself 6
Medial Pterygoid Muscle - Test yourself 7
Medial Pterygoid Muscle - Test yourself 10
Test yourself while observing the Medial Pterygoid Muscle
1
2
3
4
5
6
7
8
9