Lecture 14: Complex Movements Flashcards Preview

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Flashcards in Lecture 14: Complex Movements Deck (14):
1

What are the general functions of muscle?

- Heat production
- Posture
- Movement
- Communication

2

What're some features of quadrupedal standing?

- Base of support (large)
- Legs flexed at several joints

3

What are some features of bipedal standing?

- Relatively small area of contact with ground
- Plantar surface of feet
- Energy efficient

4

Gravity is able to work as an ______ or ______.

- When we stand up, gravity acts as antagonist
- When we sit down, gravity acts as agonist

5

Bipedal standing in the hip joint (anatomical solution)

- Posterior to joint
- Joint pushed into extension
- Extensions = ligaments are tight
- Capsular ligaments of the hip joint extended, take more strain

6

Bipedal standing at the knee joint

- Anterior to joint
- Knee is locked
- Ligaments are tight

7

Bipedal standing at ankle

- Falls into dorsiflexion
- Anterior to joint
- Not locked
- Very little muscular effort

8

Gait Cycle phases:

- Stance
- Swing

9

Stance (60%) Phase:

- Initial contact (heel strike) (early stance)
- Mid Stance
- Terminal Stance (toe off)

10

Swing (40%) Phase:

- Dorsiflexion
- Initial swing
- Mid swing
- Terminal swing

11

What muscles cause flexion at the knee?

- Hamstrings

12

What muscles causes dorsiflexion?

- Tibialis anterior (agonist / concentric)

13

What muscles causes plantarflexion?

- Triceps surae
- Gastrocnemius
- Soleus

14

What muscles cause extension at the knee?

- Quadriceps femoris