Exam 3: Hip and Pelvic Girdle

Question 1

Iliopsoas (Psoas minor and major and Iliacus)

Answer 1

Iliacus-
Origin: Iliac fossa
Insertion: lesser trochanter
Action: hip flexion, external rotation, anterior pelvic rotation, flexion and lateral flexion of lumbar spine, transverse and lateral pelvic rotation to contralateral side

Psoas-
Origin: Transverse process of lumbar vertebrae
Insertion: Lesser trochanter, pectineal line
Action: hip flexion, external rotation, anterior pelvic rotation, flexion and lateral flexion of lumbar spine, transverse and lateral pelvic rotation to contralateral side

Question 2

Sartorius

Answer 2

Origin: ASIS
Insertion: upper, anterior-medial tibia
Action: hip flexion, external rotation, abduction, knee
flexion, anterior pelvic rotation, weak knee
internal rotation

Question 3

Rectus Femoris

Answer 3

Origin: Anterior head-AIIS. Posterior head-upper acetabulum margin
Insertion: Tibial tuberosity via patellar tendon
Action: hip flexion, knee extension, anterior pelvic
rotation

Question 4

Pectineus

Answer 4

 Origin: superior ramus of pubis
 Insertion: lesser trochanter to linea aspera (pectineal line)
 Action: adduction, flexion, external rotation, anterior pelvic rotation

Question 5

Adductor Brevis

Answer 5

 Origin: inferior ramus of pubis
 Insertion: upper 1/2 medial linea aspera, lower 2/3rds of pectineal line
 Action: adduction, external rotation, assists in flexion & anterior pelvic rotation

Question 6

Adductor longus

Answer 6

 Origin: inferior ramus of pubis
 Insertion: upper 1/2 medial linea aspera, lower 2/3rds of
pectineal line
 Action: adduction, external rotation, assists in flexion & anterior pelvic rotation

Question 7

Adductor Magnus

Answer 7

 Origin: inferior ramus of pubis, ischium
 Insertion: linea aspera, adductor tubercle of femur
 Action: adduction, external rotation, extension,

Question 8

Gracilis

Answer 8

 Origin: anteromedial edge of inferior ramus
 Insertion: upper, anterior-medial surface of tibia
 Action: hip adduction, internal rotation, assists with
flexion of the hip, weak knee flexion, weak knee internal rotation

Question 9

Biceps femoris

Answer 9

 Origin: long head=ischial tuberosity
short head=1/2 down linea aspera
 Insertion: fibular head, lateral condyle of tibia
 Action: knee flexion, hip extension, hip external rotation, knee external rotation, posterior pelvic rotation

Question 10

Semimembranosus

Answer 10

 Origin: ischial tuberosity
 Insertion: posterior part of the medial condyle of tibia
 Action: knee flexion, hip extension, hip internal rotation, knee internal rotation, posterior pelvic rotation

Question 11

Semitendinosus

Answer 11

 Origin: ischial tuberosity
 Insertion: upper anterior-medial part of shaft of tibia
 Action: knee flexion, hip extension, hip internal rotation, knee internal rotation, posterior pelvic rotation

Question 12

Gluteus maximus

Answer 12

 Origin: posterior 1/4th of iliac crest, posterior sacrum/coccyx
 Insertion: IT band, greater trochanter
 Action: hip extension, external rotation, hip abduction (upper fibers), hip adduction (lower fibers), posterior pelvic rotation

Question 13

Gluteus medius

Answer 13

 Origin: lateral surface of ilium just below the crest
 Insertion: greater trochanter
 Action: abduction, flexion & internal rotation & anterior pelvic rotation (anterior fibers), extension & external rotation & posterior pelvic rotation (posterior fibers)

Question 14

Gluteus minimus

Answer 14

 Origin: lateral part of ilium below gluteus medius’ origin
 Insertion: greater trochanter
 Action: abduction, internal rotation, flexion, lateral pelvic rotation, anterior pelvic rotation

Question 15

Tensor Fasciae Latae (TFL)

Answer 15

 Origin: ASIS
 Insertion: IT band to Gerdy’s tubercle of the anterolateral tibial condyle
 Action: abduction, hip flexion, internal rotation, lateral pelvic rotation, anterior pelvic rotation

Question 16

External Rotators (6 muscles)

Answer 16

Piriformis, Obturator Externus, Obturator Internus, Gemellus Superior, Gemellus Inferior, Quadratus Femoris

 Origin: ischium
 Insertion: greater trochanter
 Action: external rotation