Muscles OIAN Lower Extremity

Rectus Abdominis Action

flexes vertebral column, supports pelvic girdle and supports abdominal viscara

Rectus Abdominis Nerve

thoracic nerves T7-T12

External Oblique Action

compresses abdomen, laterally bends and rotates vertebral column

External Oblique nerve

Thoracic nerves T7-T12

Internal Oblique Action

compresses abdomen, laterally bends and rotates vertebral column

Internal Oblique nerve

spinal nerves T8-T12

Transversus Abdominis action

compresses abdomen and laterally bends trunk

Transversus Abdominis nerve

Spinal nerves T8-T12

Erector Spinae (Spinalis Thoracis, Longissimus Thoracis and Iliocostalis lumborum) Action

hold vertebrae erect and maintains lower back posture

Iliacus Origin

Iliac fossa

Iliacus Insertion

lesser trochanter of femur

Iliacus Action

primary thigh flexor, laterally rotates thigh and flexes vertebral column

Iliacus nerve

femoral

Psoas Major orgin

L1-L5 verts

Psoas Major insertion

lesser trochanter of femur

Psoas Major action

flexes thigh, laterally rotates thigh and flexes vertebral column

Psoas Major nerve

Femoral

Tensor Fascia Latae orgin

anterior iliac crest

Tensor Fascia Latae insertion

lateral condyle of tibia

Tensor Fascia Latae action

flexes and abducts thigh

Tensor Fascia Latae nerve

superior gluteal nerve

Gluteus Maximus orgin

posterior iliac crest, sacrum and coccyx

Gluteus Maximus insertion

gluteal tuberosity and iliotibial tract

Gluteus Maximus action

extends thigh against resistance, laterally rotates thigh

Gluteus Maximus nerve

inferior gluteal nerve

Gluteus Medius orgin

lateral surface of ilium between anterior and posterior gluteal lines

Gluteus Medius insertion

greater trochanter of femur

Gluteus Medius action

abducts thigh

Gluteus Medius nerve

superior gluteal nerve

Gluteus Minimus orgin

anterior and inferior gluteal lines

Gluteus Minimus insertion

greater trochanter of femur

Gluteus Minimus action

abducts and medially rotates thigh

Gluteus Minimus nerve

superior gluteal nerve

Piriformis action

laterally rotates thigh

Superior gemellus Action

laterally rotates thigh

Obturator Internus action

laterally rotates thigh

Inferior Gemellus action

laterally rotates thigh

Quadratus Femoris action

laterally rotates thigh

Obturator Externus action

laterally rotates thigh

Sartorius orgin

anterior superior iliac spine (ASIS)

Sartorius insertion

proximal medial condyle of tibia

Sartorius action

flexes and laterally rotates thigh, flexes leg and medially rotates tibia

Sartorius nerve

femoral

Rectus Femoris orgin

anterior inferior iliac spine (AIIS)

Rectus Femoris insertion

tibial tuberosity

Rectus Femoris action

flexes thigh and extends leg

Rectus Femoris nerve

femoral

Vastus Lateralis orgin

greater trochanter and linea aspera of femur

Vastus Lateralis insertion

tibial tuberosity

Vastus Lateralis action

extends leg

Vastus Lateralis nerve

femoral

Vastus medialis orgin

spiral line and linea aspera of femur

Vastus medialis insertion

tibial tuberosity

Vastus medialis action

extends leg

Vastus medialis nerve

femoral

Vastus Intermedius orgin

anterior femur

Vastus Intermedius insertion

tibial tuberosity

Vastus Intermedius action

extends leg

Vastus Intermedius nerve

femoral

Gracilis orgin

pubic symphysis

Gracilis insertion

proximal medial condyle of tibia

Gracilis action

adducts and flexes thigh, medially rotates leg

Gracilis nerve

obturator

Pectineus orgin

pectineal line of pubis

Pectineus insertion

pectineal line of femur

Pectineus action

adducts, flexes and laterally rotates thigh

Pectineus nerve

femoral nerve

Adductor Longus orgin

pubic symphysis

Adductor Longus insertion

linea aspera of femur

Adductor Longus action

adducts, flexes and laterally rotates thigh

Adductor Longus nerve

obturator

Adductor brevis orgin

inferior ramus of pubis

Adductor brevis insertion

linea aspera of femur

Adductor brevis action

adducts, flexes and laterally rotates thigh

Adductor brevis nerve

obturator nerve

Adductor Magnus orgin

Ramus of ischium and ischial tuberosity

Adductor Magnus insertion

linea aspera and adductor tubercle of femur

Adductor Magnus action

adducts, extends, flexes thigh, medially and laterally rotates thigh

Adductor Magnus nerve

obturator

Biceps Femoris orgin

long head from ischial tuberosity and short head from linea aspera

Biceps Femoris insertion

head of fibula and lateral condyle of tibia

Biceps Femoris action

extends thigh and flexes leg

Biceps Femoris nerve

sciatic

Semitendinosus orgin

ischial tuberosity

Semitendinosus insertion

proximal medial surface of tibia

Semitendinosus action

extends thigh and flexes leg

Semitendinosus nerve

sciatic

Semimembranosus orgin

ischial tuberosity

Semimembranosus insertion

medial condyle of tibia

Semimembranosus action

extends thigh and flexes leg

Semimembranosus nerve

sciatic

Anterior Muscles of leg pneumonic

Tom, Harry, Dick, Perry

Tibialis Anterior orgin

tibia

Tibialis Anterior insertion

1st metatarsal and 1st cuneiform (medial)

Tibialis Anterior action

dorsiflexes and inverts foot

Tibialis Anterior nerve

deep fibular (peroneal) nerve

Extensor Hallicis Longus orgin

fibula

Extensor Hallucis Longus insertion

1st distal phalange

Extensor Hallucis Longus action

extends 1st phalange

Extensor Hallucis Longus nerve

deep fibular nerve