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limt-ch 16 lsn 6
Muscles of ankle & foot movement
Question | Answer |
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ORIGINS=proximal half of the lateral tibial shaft, interosseous membrane INSERTIONS= metatarsal 1, cuneiform 1(plantar surface) ACTIONS=ankle dorsiflexion, foot inversion | Tibialis Anterior |
This muscle is strenthened after an inversion sprais is healed to aid in rehabilitation. It is referred to as the stirrup muscle along with fibularis longus. | Tibialis Anterior |
stirrup muscle is comprised of these muscles | Tibialis Anterior & Fibularis longus |
ORIGINS=inf fibular head, proximal 2/3 of fibular shaft, lateral tibial condyle, interosseus membrane INSERTIONS= middle phalanges of toes 2-5, distal phalanges of toes 2-5 ACTIONS=extends toes 2-5; dorsiflexion of ankle, eversion of foot | Extensor Digitorum Longus |
ORIGIN=Calcaneus INSERTION=tendons of extensor digitorun longus to toes 2-4 ACTION=extends toes 2-4 | Extensor Digitorum Brevis |
ORIGINS=ant fibular shaft(middle region), interosseous membrane INSERTION=distal phalanx of the great toe ACTIONS=extends the great toe, ankle dorsiflexion | Extensor Hallucis Longus |
ORIGINS=fibular head, lat proximal 1/2 of fibular shaft INSERTIONS=metatarsal 1, cuneiform 1(plantar surface) ACTIONS=foor eversion, ankle plantar flexion. AKA peronius longus.one of the 'stirrup muscles'. | Fibularis Longus |
This muscle's tendon now lies behind the lateral malliolus but orginally lay in front. The latter tendon arrangement is present in predators. | Fibularis Longus |
ORIGIN=lateral distal 1/2 of fibular shaft INSERTION=metatarsal V ACTIONS=foot eversion, ankle plantar flexion. AKA peroneus brevis. | Fibularis Brevis |
This muscle's tendon now lies behind the lateral malleolus but originally lay in front. The latter tendon arrangement is present is predators. | Fibularis Brevis |
comprised of the gastrocnemius, soleus,sometimes plantaris is included. These muscles share a common tendon, aka triceps brachii of the lower extremity. Lift the weight of the body when moving walking/running, make up superficial layer of pos.leg | Triceps Surae |
ORIGINS=med & lat epicondyle of femur INSERTION=calcaneus via the Achilles tendon ACTIONS=ankle plantar flexion, knee flexion. AKA toe dancer's muscle. plantar flexion/knee flexion aka either-or situation.sometimes origin is found on knee joint capsule | Gastrocnemius |
ORIGIN=lat epicondyle femur INSERTION=calcaneus via Achilles tendon ACTIONS=ankle plantar flexion, knee flexion. AKA mini-gastrocnemius. may be removed for grafting of tendons of hands due to surgery prn | Plantaris |
ORIGINS=sup pos 1/3 of fibular shaft, soleal line of tibia INSERTION=calcaneus via Achilles tendon ACTION=ankle plantar flexion. resembles the sole fish | Soleus |
ORIGINS=pos tibial shaft,pos fibular shaft,interosseous membrane INSERTIONS=tuberosity of navicular,cuneiform 1,2,3, cuboid,calcaneus,navicular,bases of metatarsals 2,3,4 ACTIONS=foot inversion,ankle plantar flexion.may be absent | Tibialis Posterior |
ORIGIN=pos tibial shaft-middle region INSERTIONS=distal phalanges 2-5(plantar surface) ACTIONS=flexes toes 2-5 @ DIP, PIP & MP joints, ankle plantar flexion, foot inversion | Flexor Digitorum Longus |
ORIGINS=pos fibular shaft-middle region,interosseus membrane INSERTION=distal phalanx of great toe(plantar surface) ACTIONS=big toe flexion,ankle plantar flexion,foot inversion,supports longitudinal arch | Flexor Hallucis Longus |
tailor's muscle | sartorius |
hamstring that attaches to the fibular head | biceps femoris |
quadriceps femoris muscle that crosses 2 joints | rectus femoris |
muscle that initiates walking | iliopsoas |
largest outward rotator of the hip | piriformis |
strongest extender of the hip | gluteus maximus |
hamstring that is also part of the pes anserinus | semitendinosus |
adductor that forms the letter V with the femoral shaft | gracilis |
mini-gastrocnemius; missing in approximately 10% of cadavers | plantaris |
muscle that dorsiflexes the ankle & inverts the foot | tibialis anterior |
muscle the plantar flexes the ankle & everts the foot | fibularis longus |
muscle described as the key that unlocks the knee | popliteus |
muscle of plantar flexion that attaches below the knee joint | soleus |
toe dancer's muscle | gastrocnemius |
adductor muscle that attaches to the linea aspera & the adductor tubercle | adductor magnus |