skull Flashcards
1
Q
tmj joint (2)
A
- articulation of condyle of mandible and articulating surface of temporal bone
- bi-concave disc that seperates into upper and lower TMJ
2
Q
tmj- type of joint and movements (4)
A
- modified hinge joint
x axis: - opening jaw = mandibular depression (some protraction)
- closing jaw = mandibular elevation (some retraction)
- upper TMJ = protraction/ retraction and lateral deviation
3
Q
cervical spine joints (3)
A
- AO joint- occipital condyles with C1
- AA joint - C1 (axis) with C2 (atlanto)
- C2->C7
4
Q
C2-C7 joints (3)
A
- facet joints= zyagopophsyeal joints
- diarthrodial, planar joints => tri-axial/ moving in all directions
- concave inferior facet (of top v) is articulating with convex facet of lower vertebrae
5
Q
normal ROM for cervical spine joints
A
- flex/extend (x)- 50-60’/70’
- lateral rotation (z) - 45’
- rotation (y)- 70’
6
Q
AA joint (2- type and movement)
A
- uniaxial/ pivot joint
2. does rotation
7
Q
AO joint (2- type and 2 movements)
A
- biaxial condyloid
2. flex/extend and lateral rotation
8
Q
contribution of c-spine joints to movement (6)
A
flexion: 1. 1st 5'= AO joint 2. rest- C2-C7 extend: 3. 10-15'- AO joint 4. rest- 2 -> C7 as you go further into extension rotation: 5. first 40-45'- AA joint 6. rest C2->C7
9
Q
TMJ muscles-muscles of mastication (2)
A
- temporalis muscle
- masseter muscle
these two close TMJ = elevate
10
Q
temporalis muscle (2) (2movements and plapation)
A
- retraction and mandibular elevation
2. feel when chewing gum
11
Q
massiter muscle (movement)
A
- protractor
12
Q
internal ptygeroid (medial) (2+3 movements)
A
- deep to massiter
- palpable inside mouth
- protractor, elevator, contra-lateral deviation
13
Q
external/ lateral ptygeroid (3)
A
- 2 heads
- too close to axis so not elevator or depressor
- protractor, contra-lateral deviator
14
Q
TMJ depressors (5)
A
- suprahyoid
- hyoid
- mylohyoid
- geniohyoid
- digastric
15
Q
syngergy around hyoid
A
- infra and suprahyoid have synergizing energry on hyoid
