(muscle chart/ innervations) Anterior lower extremity

What is Attachment I of pectineus

Pectineal line of pubis

What is Attachment II of pectineus

Pectineal line of femur

What is the innervation of pectineus

Femoral N. and Obturator N. (L2, L3)

What are the main actions of pectineus

Hip flexion, adduction, and weak IR

What is Attachment I of psoas major

Sides of T12-L5 and IV disks, TPs of all lumbar vertebrae

What is Attachment II of psoas major

Lesser trochanter of femur as iliopsoas tendon

What is the innervation of psoas major

Lumbar plexus (L1, L2, L3)

What are the main actions of psoas major

Hip flexion and stabilization, bilateral trunk flexion with hips fixed

What is Attachment I of iliacus

Iliac crest, iliac fossa, and ala of sacrum

What is Attachment II of iliacus

Lesser trochanter of femur as iliopsoas tendon

What is the innervation of iliacus

Femoral N. (L2, L3)

What are the main actions of iliacus

Hip flexion and trunk flexion from supine

What is Attachment I of sartorius

ASIS

What is Attachment II of sartorius

Superior medial tibia at pes anserinus

What is the innervation of sartorius

Femoral N. (L2, L3)

What are the main actions of sartorius

Hip flexion, abduction, ER, weak knee flexion and IR

What is Attachment I of rectus femoris

AIIS and ilium superior to acetabulum

What is Attachment II of rectus femoris

Common quadriceps tendon to patella

What is the innervation of rectus femoris

Femoral N. (L2, L3, L4)

What are the main actions of rectus femoris

Extends knee, steadies hip, and assists hip flexion

What is Attachment I of vastus lateralis

Greater trochanter, linea aspera, and gluteal tuberosity of femur

What is Attachment II of vastus lateralis

Common quadriceps tendon to patella

What is the innervation of vastus lateralis

Femoral N. (L2, L3, L4)

What is the main action of vastus lateralis

Knee extension

What is Attachment I of vastus medialis

Intertrochanteric line and linea aspera of femur

What is Attachment II of vastus medialis

Common quadriceps tendon to patella

What is the innervation of vastus medialis

Femoral N. (L2, L3, L4)

What is the main action of vastus medialis

Knee extension

What is Attachment I of vastus intermedius

Anterior and lateral femoral shaft

What is Attachment II of vastus intermedius

Common quadriceps tendon to patella

What is the innervation of vastus intermedius

Femoral N. (L2, L3, L4)

What is the main action of vastus intermedius

Knee extension

What is Attachment I of the hamstring part of adductor magnus

Ischial tuberosity

What is Attachment II of the hamstring part of adductor magnus

Adductor tubercle of femur

What is the innervation of the hamstring part of adductor magnus

Tibial N. (L4)

What are the main actions of the hamstring part of adductor magnus

Hip adduction and extension

What is Attachment I of the adductor part of adductor magnus

Inferior pubic ramus and ischial ramus

What is Attachment II of the adductor part of adductor magnus

Gluteal tuberosity and linea aspera of femur

What is the innervation of the adductor part of adductor magnus

Obturator N. (L2, L3, L4)

What are the main actions of the adductor part of adductor magnus

Hip adduction and flexion

What is Attachment I of adductor longus

Body of pubis inferior to crest

What is Attachment II of adductor longus

Middle one-third of linea aspera of femur

What is the innervation of adductor longus

Obturator N. (L2, L3, L4)

What are the main actions of adductor longus

Hip adduction and extension

What is Attachment I of adductor brevis

Inferior pubic ramus

What is Attachment II of adductor brevis

Pectineal line and proximal linea aspera of femur

What is the innervation of adductor brevis

Obturator N. (L2, L3)

What are the main actions of adductor brevis

Hip adduction and weak flexion

What is Attachment I of obturator externus

Margins of obturator foramen and membrane

What is Attachment II of obturator externus

Trochanteric fossa of femur

What is the innervation of obturator externus

Obturator N. (L3, L4)

What are the main actions of obturator externus

Hip adduction and ER, steadies head of femur in acetabulum

What is Attachment I of gracilis

Body and inferior pubic ramus

What is Attachment II of gracilis

Superior medial tibia at pes anserinus

What is the innervation of gracilis

Obturator N. (L2, L3)

What are the main actions of gracilis

Hip adduction, weak flexion and IR

What is Attachment I of tibialis anterior

Lateral tibial condyle, superior two-thirds lateral tibia, and IM

What is Attachment II of tibialis anterior

Medial cuneiform and base of MT1

What is the innervation of tibialis anterior

Deep Fibular N. (L4, L5)

What are the main actions of tibialis anterior

Ankle DF, inversion, and support of medial longitudinal arch

What is Attachment I of extensor digitorum longus

Lateral tibial condyle, superior two-thirds anterior fibula, and IM

What is Attachment II of extensor digitorum longus

Middle and distal phalanges 2-5

What is the innervation of extensor digitorum longus

Deep Fibular N. (L4, L5, S1)

What are the main actions of extensor digitorum longus

Extends digits 2-5 and assists ankle DF

What is Attachment I of extensor hallucis longus

Middle anterior fibula and IM

What is Attachment II of extensor hallucis longus

Dorsal base and distal phalanx of digit 1

What is the innervation of extensor hallucis longus

Deep Fibular N. (L4, L5)

What are the main actions of extensor hallucis longus

Extends digit 1 and assists ankle DF

What is Attachment I of fibularis tertius

Inferior one-third of anterior fibula and IM

What is Attachment II of fibularis tertius

Dorsal base of MT5

What is the innervation of fibularis tertius

Deep Fibular N. (L5, S1)

What are the main actions of fibularis tertius

Ankle DF, assists eversion, protects ATFL, and proprioception

What is Attachment I of fibularis longus

Head and superior two-thirds lateral fibula

What is Attachment II of fibularis longus

Base of MT1 and medial cuneiform

What is the innervation of fibularis longus

Superficial Fibular N. (L5, S1, S2)

What are the main actions of fibularis longus

Ankle eversion and weak PF

What is Attachment I of fibularis brevis

Inferior two-thirds lateral fibula

What is Attachment II of fibularis brevis

Base and dorsal lateral tuberosity of MT5

What is the innervation of fibularis brevis

Superficial Fibular N. (L5, S1, S2)

What are the main actions of fibularis brevis

Ankle eversion and weak PF

What is Attachment I of extensor digitorum brevis

Lateral calcaneus

What is Attachment II of extensor digitorum brevis

Long extensor tendons of toes 2-4

What is the innervation of extensor digitorum brevis

Deep Fibular N. (L5, S1)

What is the main action of extensor digitorum brevis

Aids EDL in extension of toes 2-4 at MTP and IP joints

What is Attachment I of extensor hallucis brevis

Lateral calcaneus

What is Attachment II of extensor hallucis brevis

Dorsal base of proximal phalanx of digit 1

What is the innervation of extensor hallucis brevis

Deep Fibular N. (L5, S1)

What is the main action of extensor hallucis brevis

Aids EHL in extension of digit 1 at MTP joint