Trunk, Hip, and Thigh Flashcards
Pect Major
O: clavicle and sternum
I: intertubercular groove
N: lateral and medial pectoral N (C5-T1)
A: adduct and IR; draws scapula anterior and inferior
Pect Minor
O: ribs 3-5
I: coracoid process
N: medial pectoral (C8-T1)
A: draws scapula inferiorly and superiorly against thoracic wall
Subclavius
O: 1st rib
I: clavicle
N: subclavius N
A: depresses clavicle
External Intercostal
O: inferior border of ribs
I: superior border of ribs below
N: intercostal nerve
A: elevates ribs - (fibers run medial and inferior)
Internal Intercostal
O: inferior border of ribs
I: superior border of ribs below
N: intercostal nerve
A: depress ribs during expiration - fibers run lateral and inferior)
Rectus Abdominis
O: pubic symphysis
I: xiphoid process, 5-7 costal cartilages
N: thoraco-abdominal nerves (T7-12)
A: trunk flexion, pelvic tilt, visceral compression during respiration
External Oblique
O: 5-12 ribs
I: pubic tubercle, iliac crest
N: thoraco-abdominal nerves T7-12
A: support abdominal viscera; with the help of the contralateral internal oblique, flexion and rotation of trunk
Internal Oblique
O: thoracolumbar fascia, iliac crest
I: 10-12 ribs
N: thoraco-abdominal nerves T7-12 and L1
A: support abdominal viscera; flex and rotate trunk
Transverse Abdominis
O: 7-12 costal cartilages, thoracolumbar fascia, iliac crest
I: linea alba with internal oblique; pubic crest
N: thoraco-abdominal nerves T7-12 and L1
A: support abdominal viscera
Gluteus Maximus
O: sacrum/coccyx, thoracolumbar fascia
I: fibers into iliotibial tract that attaches to lateral condyle of tibia tuberosity; gluteal tuberosity
N: inferior gluteal nerve (L5-S2)
A: extends thigh, ER, abduction; raises trunk from flexed position
Gluteus Medius
O: surface of ilium
I: superior, lateral surface of greater trochanter
N: superior gluteal nerve (L4-S1)
A: abductor of thigh, IR thigh
Gluteus Minimus
O: surface of ilium
I: anterior, lateral surface of the greater trochanter
N: superior gluteal nerve (L4-S1)
A: abduction, IR, and steadies pelvis
Piriformis
O: internal surface of sacrum (S2-4)
I: superior surface of greater trochanter
N: nerve to piriformis (S1-S2)
A: ER of thigh, abduction of flexed thigh
Superior Gemellus
O: ischial spine
I: medial surface of greater trochanter
N: N to obturator internus (L4-S1)
A: ER when thigh extended; abducts flexed thigh
Inferior Gemellus
O: ischial tuberosity
I: medial surface of greater trochanter
N: N to quadratus femoris (L4-S1)
A: ER, abducts flexed thigh
Obturator Internus
O: obturator membrane
I: medial surface of greater trochanter
N: N to obturator internus (L4-S1)
A: ER, abducts flexed thigh
Quadratus Femoris
O: ischial tuberosity
I: intertrochanteric crest (posterior femur)
N: N to quadratus femoris (L4-S1)
A: ER
Obturator Externus
O: obturator foramen/ membrane
I: trochanteric fossa of femur
N: obturator nerve (L2-4)
A: ER thigh
Semitendinosus
O: ischial tuberosity
I: medial surface of tibia
N: tibial division (L4-S3)
A: flexes knee, IR of flexed leg, extends thigh; pulls trunk upright against gravity
Semimembranosus
O: ischial tuberosity
I: medial condyle of tibia
N: tibial division (L4-S3)
A: flexes knee, IR of flexed leg, extends thigh; pulls trunk upright against gravity
Biceps Femoris
O: ischial tuberosity and linea aspera/supracondylar line
I: lateral side of head of fibula
N: long (tibial division); short (common fibular - L4-S2)
A: flexes knee, ER of flexed leg, extends thigh; pulls trunk upright against gravity
Tensor Fascia Lata
O: ASIS, iliac crest, fascia lata
I: lateral condyle of tibia
N: superior gluteal nerve (L4-S1)
A: abducts, IR, flexes thigh, keeps knee extended
Rectus Femoris
O: AIIS / groove anterior to acetabulum
I: tibial tuberosity
N: femoral nerve (L2-4)
A: extends knee, flexes hip
Vastus Medialis
O: intertrochanteric line
I: tibial tuberosity
N: femoral nerve (L2-4)
A: extends knee
Vastus Lateralis
O: greater trochanter
I: tibial tuberosity
N: femoral nerve (L2-4)
A: extends knee
Vastus Intermedius
O: anterior surface of femur
I: tibial tuberosity
N: femoral nerve (L2-4)
A: extends knee
Sartorius
O: ASIS
I: medial surfac eof tibia
N: femoral nerve (L2-4)
A: flexes, abducts, and ER thigh; flexes knee
Pectineus
O: pectineal line of pubis
I: pectineal line of femur
N: femoral nerve (L2-4)
A: adducts and flexes thigh
Adductor Longus
O: body of pubis; inferior to pubic crest
I: linea aspera of femur
N: obturator nerve (L2-4)
A: adducts thigh
Adductor Brevis
O: inferior ramus of pubis
I: proximal part of linea aspera of femur
N: obturator nerve (L2-4)
A: adducts thigh/ flexes thigh
Adductor Magnus
O: ramus of pubis/ischium, ischial tuberosity
I: gluteal tuberosity, linea aspera on femur; supracondylar line and adductor tubercle of femur (hamstring division)
N: adductor - obturator; hamstring - tibial division (L4-S3)
A: adducts thigh
Gracilis
O: body and inferior ramus of pubis
I: medial surface of tibia - pes anserinus
N: obturator nerve (L2-4)
A: adducts thigh, flexes leg, IR when knee if flexed
