Glut and Posterior Leg Muscles Flashcards
Deep Gluts
Piriformis Gemellus Superior Obturator Internus Gemellus Inferior Quadratus Femoris
Superficial Gluts
Glut Max
Glux Min
Glut Med
Tensor Fascia Latae
Gluteus Maximus
Extension, lateral rotation of thigh
Acts on ITT with tensor fascia latae to stabilize knee
important in going up stairs and standing up from sitting
N: Inferior Gluteal N
Gluteus Medius
Abduction of thigh
Posterior act w/glut max: laterally rotate thigh
Anterior act w/glut min: medially rotate thigh
Levels sacral base when opposit limb is unsupported
N: Superior Gluteal
Gluteus Minimus
Abducts, medially rotates thigh
Acts with glut med in leveling sacral base
N: Superior Gluteal
Piriformis
O: anterior sacrum
I: greater trochantor of femus
A: Abduction of thigh, lateral rotation of thigh
N: Nerve to piriformis
Gemellus superior
O: Ishial Spine
I: tendon of obturator internus
A: lateral rotation of thigh, SOME abduction of thigh
N: Nerve to obturator internus
Gemellus Inferior
O: ishial tuberosity
I: tendon of obturator internus
A: lateral rotation of thigh
N: Nerve to Quadratus Inferior
Quadratus Femoris
O: Ishial Tuberosity
I: Quadrate line between trochantors
A: Lateral rotation of thigh
N: Nerve to quadratus femoris
Biceps femoris
O: long head= ishial tuberosity
short head = linea aspera of femur
I: Lateral condyle of tibia, head of fibula
A: Long head: Extends thigh, flexes leg
Short head: flexes leg
N: L= tibial component of sciatic
S= common fibular
Semimembranous
extends thigh, flexes leg, medially rotates leg when knee is flexed
N: Tibial from sciatic
Semitendinous
Extends thigh, flexes and medially rotates leg when knee is flexed
N: tibial component of sciatic N
Tibialis Anterior
O: lateral tibia, IOM
I: Medial cuneiform and base of 1st metatarsal
A: Dorsiflexes and inverts foot
N: Deep fibular
Extensor digitorum longus
O: fibula and IOM
I: Middle and distal phalanges of 4 lesser toes
A: extends toes 2-5, dorsiflex foot
N: Deep fibular
Fibularis Tertius
O: Distal Fibula
I: Base of 5th metatarsal
A: Aids in eversion and dorsiflexion
Extensor Hallucis Longus
O: mid fibula (deep muscle)
I: base of distal phalanx of great toe
A: extends great toe, dorsiflex foot
N: Deep Fibular
Extensor Digitorum Brevis
O: Calcaneous
I: base of proximal phalanx of great toe, toes 2,3,4 vis tendons of extensor digitorum longus
A: extends toes 1,2,3,4
N: Deep Fibular
Lateral Crural Compartment muscles
Fibularis longus
Fibularis brevis
Fibularis Longus
O: upper fibula
I: 1st metatarsal and medial cuneiform
A: Everts and plantar flexes foot
N Superficial fibular
Fibularis Brevis
O: Distal lateral fibula
I: Base of 5th metatarsal
A: Everts and plantar flexes foot
N Superficial fibular
Gastrocnemius
plantar flexes foot, flexes leg
tibial nerve
Soleus
plantar flexes foot
tibial nerve
Plantaris
Weakly plantar flexes foot and flexes leg
Tibial N
Popliteus
Flexes and medially rotates leg
When foot fixed - laterally rotates femur to unlock knee joint as leg flexion proceeds
N: Tibial
