topic 15

Question 1

muscles groups of hip

Answer 1

2 groups :
I.Inner (4):
1.Psoasmajor
2.psoas minor
3.iliacus
4.piriformis
5.obturtaor internus
II.Outer (8):
1.Gluteus maximus
2.gluteus medius
3.gluteus minimus
4.tensor fascia latae
5.superior gemellus
6.inferior gemellus
7.quadratus femoris
8.obturator externus

Question 2

flexion participating muscles

8

Answer 2

Flexion: Moving the thigh forward

Primary Muscles Involved:
Iliopsoas (Iliacus and Psoas Major)
Rectus Femoris (part of the quadriceps group)
Sartorius
Tensor Fasciae Latae
Pectineus
Adductor Longus
Adductor Brevis
Adductor Magnus (anterior part)

Question 3

Suprapiriform hiatus = greater sciatic foramen

Answer 3

-Borders:
Superior – anterior sacroiliac ligament
Posteromedial – sacrotuberous ligament
Anterolateral – greater sciatic notch of the ilium
Inferior – sacrospinous ligament and ischial spine

contents:
Superior gluteal artery (from internal iliac a.) and vein
Superior gluteal nerve-supplies pirirformis and obturator internus (AVN)

Question 4

infrapiriformis = lesser sciatic notch

Answer 4

contents : Superior – sacrospinous ligament and ischial spine
Anterior – ischial spine, lesser sciatic notch and ischial tuberosity
Posterior – sacrotuberous ligament

contents :
-Internal pudendal artery and vein
-Pudendal nerve (note the pudendal nerve first leaves the pelvis via the greater sciatic foramen, and then re-enters via the lesser sciatic foramen)
-Obturator internus tendon
-Nerve to obturator internus

Question 5

extension

Answer 5

Extension: Moving the thigh backward

Primary Muscles Involved:
Gluteus Maximus
Hamstrings (Biceps Femoris, Semitendinosus, Semimembranosus)
Adductor Magnus (posterior part)

Question 6

abduction

Answer 6

Abduction: Moving the thigh away from the midline

Primary Muscles Involved:
Gluteus Medius
Gluteus Minimus
Tensor Fasciae Latae
Sartorius

Question 7

adduction

Answer 7

Adduction: Moving the thigh toward the midline

Primary Muscles Involved:
Adductor Longus
Adductor Brevis
Adductor Magnus
Pectineus
Gracilis

Question 8

internal/medial rotation

Answer 8

Internal (Medial) Rotation: Rotating the thigh inward

Primary Muscles Involved:
Gluteus Medius (anterior fibers)
Gluteus Minimus
Tensor Fasciae Latae
Adductor Longus
Adductor Brevis
Pectineus

Question 9

external/lateral rotation

Answer 9

External (Lateral) Rotation: Rotating the thigh outward

Primary Muscles Involved:
Gluteus Maximus
Piriformis
Obturator Internus
Obturator Externus
Gemellus Superior
Gemellus Inferior
Quadratus Femoris
Sartorius