Phasic Muscle Activity

Question 1

Durring what phase of gait is the Adductor Magnus at peak activity?

Answer 1

Heel Contact

Question 2

Durring what phase of gait is the Sartorious at peak activity?

Answer 2

Initial Swing (Toe Off)

Question 3

Durring what phase of gait is the Adductor Longus at peak activity?

Answer 3

Pre Swing (Toe Off)

Question 4

Durring what phase of gait is the Soleus at peak activity?

Answer 4

Terminal Stance (Heel Off)

Question 5

Durring what phase of gait is the Peroneus Brevis at peak activity?

Answer 5

Terminal Stance (Heel Off)

Question 6

Durring what phase of gait is the EHL at peak activity?

Answer 6

Initial Swing (Toe Off)

Question 7

Durring what phase of gait is the EDL at peak activity?

Answer 7

Initial Swing (Toe Off)

Question 8

Durring what phase of gait is the FDL at peak activity?

Answer 8

Terminal Stance (Heel Off)

Question 9

Durring what phase of gait is the FHL at peak activity?

Answer 9

Terminal Stance (Heel Off)

Question 10

Durring what phase of gait are the Quadriceps at peak activity?

Answer 10

Loading Response (Foot Flat)

Question 11

Durring what phase of gait is the Gluteus Maximus at peak activity?

Answer 11

Heel Contact (Initial Contact)

Question 12

Durring what phase of gait is the Iliacus at peak activity?

Answer 12

Initial Swing (Toe Off)

Question 13

Durring what phase of gait is the Gracilis at peak activity?

Answer 13

Initial Swing (Toe Off)

Question 14

Durring what phase of gait is the Rectus Femoris at peak activity?

Answer 14

Pre Swing (Toe Off)

Question 15

Durring what phase of gait is the Semitendonosus at peak activity?

Answer 15

Terminal Swing

Question 16

Durring what phase of gait is the Semimembranosus at peak activity?

Answer 16

Terminal Swing

Question 17

Durring what phase of gait is the Peroneus Longus at peak activity?

Answer 17

Terminal Stance (Heel Off)

Question 18

Durring what phase of gait is the Gastrocnemius at peak activity?

Answer 18

Terminal Stance (Heel Off)

Question 19

Durring what phase of gait is the Biceps Femoris at peak activity

Answer 19

Initial Swing (Toe Off) -> Terminal Swing

Question 20

Durring what phase of gait is the Tibialis Anterior at peak activity?

Answer 20

Initial Swing (Toe Off) -> Terminal Swing

Question 21

Durring what phase of gait is the Tibialis Posterior at peak activity?

Answer 21

Terminal Stance (Heel Off)

Question 22

Define Concentric Muscle Contraction and provide an example

Answer 22

The muscle shortens while contracting, producing acceleration
-Ex: Gastrocnemius in Terminal Stance

Question 23

Define Eccentric Muscle Contraction and provide an example

Answer 23

The muscle length increases while contracting, producing deceleration. Associated with shock absorption
-Ex: Soleus at Midstance, decelerates the forward momentum of the tibia

Question 24

Define Isometric Muscle Contraction and provide an example

Answer 24

The muscle length remains the same while contracting, providing stability. Primarily used in postural muscles
-Ex: Hip abductors in Midstance