Appendicular Muscles (OIA) + Axial Muscles
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MUSCLES THAT MOVE WRIST AND DIGITS (Anterior compartment of the forearm) Belongs to the superficial layer of the anterior forearm compartment
Flexor carpi radialis Origin: Medial epicondyle of humerus Insertion: Metacarpals Action: Wrist flexion + abduction
MUSCLES THAT MOVE WRIST AND DIGITS (Anterior compartment of the forearm)
Palmarus longus Origin: medial condyle of humerus Insertion: palmar aponeurosis Action: wrist flexion
MUSCLES THAT MOVE WRIST AND DIGITS (Anterior compartment of the forearm)
Flexor carpi ulnaris Origin: medial epicondyle of humerus Insertion: carpal bones Action: wrist flexion/adduction
MUSCLES THAT MOVE WRIST AND DIGITS Posterior to “flexor carpi radialis” + “palmaris longus”
Flexor digitorum superficialis Origin: medial epicondyle Insertion: middle phalanges of digits 2-5 Action: finger flexion of MCP and PIP joint
MUSCLES THAT MOVE WRIST AND DIGITS Posterior to “flexor carpi radius” + “flexor digitorum superficialis” + “flexor digitorum profundus”
Flexor pollicis longus Origin: anterior surface of radius Insertion: palmar surface of distal phalanx of thumb Action: Thumb flexion using MCP and IP joint 1
MUSCLES THAT MOVE WRIST AND DIGITS Posterior to “flexor carpi radialis” + “flexor digitorum superficialis”
Flexor digitorum profundus Origin: proximal half of anterior surface of ulna, interosseous membrane Insertion: palmar surfaces of distal phalanges of digits 2-5 Action: finger flexion of MCP and IP joints 2-5
MUSCLES THAT MOVE WRIST AND DIGITS
Extensor carpi radialis longus Origin: lateral supercondylar ridge of humerus Insertion: posterior aspect of base of metacarpal bone Action: hand extension, hand abduction
MUSCLES THAT MOVE WRIST AND DIGITS Posterior view of the forearm
Extensor digitorum Origin: lateral epicondyle of humerus Insertion: extensor expansions of digits 2-5 Action: MCP and IP joints 2-5 for finger extension
MUSCLES THAT MOVE WRIST AND DIGITS Posterior view of the forearm
Extensor digiti minimi Origin: lateral epicondyle of humerus Insertion: extensor expansion of digit 5 Action: MCP joint 5 - finger extension
MUSCLES THAT MOVE WRIST AND DIGITS Posterior view of forearm; posterior to “extensor digitorum” + “extensor digiti minimi” + “extensor carpi ulnaris”
Abductor pollicis longus Origin: posterior surface of proximal radius, ulna, and interosseous membrane Insertion: posterior aspect of base of MC bone Action: hand extension and thumb abduction
MUSCLES THAT MOVE WRIST AND DIGITS Posterior view of forearm; posterior to “extensor digitorum” + “abductor pollicis longus”
Extensor pollicis brevis Origin: posterior surface of the distal third of the radius Insertion: posterior aspects of base of proximal phalanx 1 Action: CMCP joint 1 - thumb extension
MUSCLES THAT MOVE THE FEET AND TOES
Tibalis anterior Origin: lateral surface of tibia Insertion: medial base of tarsal bones + MTB 1 Action: subtalar joint - foot inversion
MUSCLES THAT MOVE THE FEET AND TOES Anterior view of leg; posterior to “extensor digitorum longus” + “tibialis anterior”
Extensor hallucis longus Origin: middle third of medial surface of fibula + interosseous membrane Insertion: dorsal aspect of phalanx belonging to big toe Action: toe extension + foot dorsiflexion
MUSCLES THAT MOVE THE FEET AND TOES Anterior view of leg; lateral to “extensor hallucis longus” + posterior to “tibialis anterior”
Extensor digitorum longus Origin: proximal surface of fibula Insertion: dorsal aspect of phalanges 2-5 Action: MTP and IP joint - toe extension + foot dorsiflexion + foot eversion
MUSCLES THAT MOVE THE FEET AND TOES Lateral view of leg
Fibularis (peroneus) longus Origin: head of fibula Insertion: lateral aspect of tarsal bone Action: foot plantar flexion, foot eversion
MUSCLES THAT MOVE THE FEET AND TOES Lateral view of leg; posterior to “fibularis longus”
Fibularis (peroneus) brevis Origin: Lateral aspect of middle surface of the fibula Insertion: metatarsal bone Action: foot plantar flexion + foot eversion
MUSCLES THAT MOVE THE FEET AND TOES Posterior view of leg
Gastrocnemius Origin: lateral head - surface of lateral condyle of the femur + medial head - medial femoral condyle Insertion: posterior surface of calcaneus via Achille’s tendon Action: plantar flexion + leg flexion
MUSCLES THAT MOVE THE FEET AND TOES Posterior view of leg; posterior to “gastrocnemius”
Soleus Origin: soleal line, medial border of tibia, head of fibula Insertion: posterior surface of calcaneus via Achilles tendon Action: plantar flexion
MUSCLES THAT MOVE THE FEET AND TOES Posterior view of leg; posterior to “gastrocnemius” + “Achille’s tendon” + “soleus” + “flexor hallucis longus”
Tibialis posterior Origin: posterior surface of tibia and fibula Insertion: medial aspect of tarsal bones Action: plantar flexion + foot inversion
MUSCLES THAT MOVE THE FEET AND TOES Posterior view of leg; proximal end of posterior leg + posterio to “gastrocnemius”
Popliteus Origin: lateral condyle of femur Insertion: posterior surface of proximal tibia Action: unlocks knee joint + stabilization
MUSCLES THAT MOVE THE FEET AND TOES Posterior view of leg; medial + posterior to “gastrocnemius” + “Achille’s tendon”
Flexor digitorum longus Origin: posterior surface of tibia Insertion: solar aspect of bases of distal phalanges 2-5 Action: toe flexion + plantar flexion + foot inversion
MUSCLES THAT MOVE THE FEET AND TOES Posterior view of leg; posterior to “gastrocnemius” + “Achilles tendon” + lateral to “flexor digitorum longus”
Flexor hallucis longus Origin: distal 2/3 of posterior surface of fibula, interosseous membrane, posterior intermuscular septum of leg, fascia of tibialis muscle Insertion: base of distal phalanx of great toe Action: MTP and IP joint - toe flexion + foot plantar flexion + foot inversion
MUSCLES THAT MOVE THE FEMUR, TIBIA, AND FIBULA
Gracilis Origin: anterior body of pubis, inferior pubic ramus, ischial ramus Insertion: medial surface of proximal tibia Action: thigh flexion, adduction + leg flexion and internal rotation of leg
MUSCLES THAT MOVE THE FEMUR, TIBIA, AND FIBULA
Rectus femoris Origin: anterior inferior iliac spine + supra-acetabular groove Insertion: tibial tuberosity via patellar ligament Action: thigh flexion