Functional Anatomy of Major Muscles - Hip Complex

Question 1

Adductor Longus

Answer 1

Isolated function: concentric-accelerates hip abduction, flexion, and internal rotation
integrated function: eccentric-decelerates abduction, extension, and external rotation
isometric-stabilizes the lumbo-pelvic-hip complex

Question 2

Adductor Magnus, anterior fibers

Answer 2

Isolated function: Concentric- accelerates hip adduction, flexion, and internal rotation
integrated function: eccentric-decelerates hip abduction, extension, and external rotation
isometric-stabilizes the lumbo-pelvic-hip complex

Question 3

Adductor Magnus, posterior fibers

Answer 3

Isolated function: concentric-accelerates adduction, extension, and external rotation
integrated function: eccentric-decelerates hip abduction, flexion, and internal rotation
isometric-stabilizes the lumbo-pelvic-hip complex

Question 4

Adductor brevis

Answer 4

Isolated function: Concentric - accelerates hip abduction, flexion, and internal rotation
integrated function: eccentric decelerates abduction, extension, and external
isometric-stabilizes the lumbo-pelvic-hip complex

Question 5

Gracilis

Answer 5

Isolated function: concentric- accelerates hip adduction, flexion, and internal rotation; aasists in tibial internal rotation
Integrated function: Eccentric- decelerates hip abduction, extension, and external rotation
Isometric: stabilizes the lumbo-pelvic-hip complex and knee

Question 6

Pectineus

Answer 6

Isolated function: concentric-accelerates adduction, flexion, and internal rotation
integrated function: eccentric-decelerates abduction, extension, and external rotation
isometric-stabilizes the lumbo-pelvic-hip complex.

Question 7

Gluteus medius, anterior fibers

Answer 7

isolated function: concentric-accelerates hip abduction and internal rotation
integrated function: eccentric-decelerates adduction and external rotation
isometric-dynamically stabilizes the lumbo-pelvic-hip complex

Question 8

Gluteus medius, posterior fibers

Answer 8

isolated function: concentric-accelerates hip abduction and external rotation
integrated function: eccentric-decelerates hip adduction and internal rotation
isometric-dynamically stabilizes the lumbo-pelvic-hip complex

Question 9

Gluteus Minimus

Answer 9

Isolated function: Concentric- accelerates hip abduction, flexion, and internal rotation
integrated function: eccentric- decelerates frontal plane hip adduction, extension, and external rotation
isometric-stabilizes the lumbo-pelvic-hip complex

Question 10

Tensor Fascia Latae

Answer 10

Isolated function: concentric-accelerates hip flexion, abduction, internal rotation
integrated function: eccentric-decelerates hip extension, adduction, and external rotation
isometric-stabilizes the lumbo-pelvic-hip complex

Question 11

Gluteus maximus

Answer 11

Isolated function: concentric-accelerates extension and external rotation
integrated function: eccentric-decelerates hip flexion, internal rotation, tibial internal rotation via iliotibial band
Isometric-stabilizes the lumbo-pelvic-hip complex

Question 12

Psoas

Answer 12

Isolated function: Concentric-accelerates hip flexion and external rotation, extends and rotates lumbar spine
integrated function: eccentric-decelerate hip internal rotation and decelerate hip extension
isometric- stabilizes the lumbo-pelvic-hip complex

Question 13

Sartorius

Answer 13

Isolated function: concentric-accelerates flexion, external rotation and abduction, accelerates knee flexion and internal rotation
integrated function: eccentric-decelerates hip extension, external rotation, knee extension, and external rotation
isometric-stabilizes the lumbo-pelvic-hip complex and knee

Question 14

Piriformis

Answer 14

Isolated function: Concentric-accelerates hip external rotation, abduction and extension
integrated function: eccentric-decelerates hip internal rotation, adduction, and flexion
isometric-stabilizes the hip and sacroiliac joints