Muscles And Tmj

Front 1

pennate muscle shape

Back 1

lookes like feather (uni-Bi and Multipennate).

-Contain more Moyofirils than parallel muscles

-Develop more tension than parallel muscles

Front 2

Synegists muscle:

Back 2

is a muscle to prevent unwanted mvnt at other joints or to aid the mvnt of Agonist muscle.

Front 3

Fixators

Back 3

Fixator muscle, stabilize the origin of the Agonist , so the agonist act more efficiently.

Front 4

Ligament that connecs the Axis to Occiput:

Back 4

1- Tectorial membrane (is situated within the vertebral canal)

2- 2 Alars.

3- Apical Odontoid (or Dens)

4-Cruciated ligaments (looks like + shape) it connects the axis to the atlas ans the atlas to the occiput.

Front 5

TMJ (TempoMandibular Joint)

Back 5

-It is a modified hinge ( or Hinge and planer joint).

-has Articular Disc (a fibrous extension of the capsule) It devides TMJ into 2 compartments:

1-Inf Compart: where mandible articulates with articular disc (hinge mvnt for Depression and elevation).

2-superior Compartment: Articular disc articulate with Temporal bone to produce a Transitional mvnt or gliding mvnt. (protrusion and retrusion)

Front 6

Muscle of Mastination: TMJ- Elevation

Back 6

1-Temporalis..

2-Masseter.

3-Medial pterygoid

Front 7

Muscle of Mastication: TMJ-Depression

Back 7

1-Lateral Pterygoid (bilaterally)

2-Suprahyoids (Disgastric,ant.belly)

3-Mylohyoid & Geniohyoid.

Front 8

TMJ- protrusion:

Back 8

1-Masseter (the suerficial fibers)

2-Lateral Pterygoid (Bilaterally)

3-Medial Pterygoid.

Front 9

TMJ-Retrusion:

Back 9

1-Temporalis (post-fibers)

2-masseter (deep fibers)

Front 10

TMJ- Lateral Excursion:

Back 10

1-Temporalis (same side of movnt)

2-Pterygoid (unilaterally)

3-Masseter

Front 11

Temporalis Insertion point

Back 11

is the coronoid process of the mandible

Front 12

Masseter muscle (for TMJ)

Back 12

origin is Zygomatic Arch.

Insersion is body and ramus of mandible.

 

Front 13

Innervation of (masseter, Temporalis, Pterygoids, MyloHyoid, Digastric Anterior Belly)

Back 13

 Trigeminal Nerve or CN-V3

Front 14

Innervation of Genihyoid

Back 14

1st cervical Spinal Nerve

Front 15

Innervation of Digastric Posterior Belly:

Back 15

Facial Nerve CN VII

Front 16

Pterygoids -Lateral and Medial

Back 16

Lateral -2 heads upper and lower: Origin is at Lateral late of Ethmoid bone, Insertion is at Articular Capsule..

Medial -2 heads superficial and deep: origin Pterygoid  plate, insertion is at the inferior surface od the mandibular ramus.