Muscle Review: Exam 1 Flashcards by Eric Swanson

Iliopsoas

Insertion/Origin: Combined iliacus and psoas major, inserts on the lesser trochanter of the femur

Innervation: L2-L4

Blood supply: medial femoral circumflex artery and iliolumbar artery

Action: Flexes the hip

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Pectineus

Insertion/Origin: Inserts on pectineal line near lesser trochanter

Innervation: femoral nerve

Blood Supply: obturator artery

Action: thigh flexion and abduction

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Quadriceps

Insertion/Origin: rectus femoris on the hip, vastus muscles on the femur, all insert on tibial tuberostiy

Innervation: femoral nerve

Blood Supply: femoral artery

Action: flex thigh at the hip (rectus femoris) and extesion of the leg

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Sartorius

Insertion/Origin: ASIS to pes anserinus

Innervation: femoral nerve

Blood Supply: femoral atery

Action: flexion of thigh, lateral rotation of thigh, abduction of thigh, flexion of knee

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Adductor longus/brevis

Insertion/Origin: linea aspera to pubis

Innervation: anterior branch of obturator nerve (longus) - obturator nerve (brevis)

Blood Supply: deep femoral artery

Action: adduction of thigh

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Adductor magnus

Insertion/Origin: linea aspera to pubis/ischeal tuberosity

Innervation: posterior branch of obturator nerve (adduction) and tibial nerve (hamstring)

Blood Supply: deep femoral artery

Action: adduction and extension of hip

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Gluteus maxiumus

Insertion/Origin: hip bone to gluteal tuberosity of femur

Innervation: inferior gluteal nerve

Blood Supply: superior and inferior gluteal arteries

Action: extension of hip, supports extended knee, abduction of hip (lateral rotation)

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Gluteus medius/minimus

Insertion/Origin: Ilium to greater trochanter

Innervation: superior gluteal nerve

Blood Supply: superior gluteal artery

Action: abduction and medial rotation (anterior portions)

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Tensor fascia lata

Insertion/Origin: iliac crest to iliotibial tract

Innervation: superior gluteal nerve

Blood Supply: lateral circumflex femoral artery

Action: flexion of thigh, medial rotation and abduction

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Piriformis

Insertion/Origin: sacrum to great trochanter (medial surface)

Innervation: nerve to the piriformis

Blood Supply: gluteal arteris

Action: lateral rotation

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Superior/inferior gemelli

Insertion/Origin: ischeal tuberostiy to obturator tendon

Innervation: nerve to quadratus femoris/oburator internus

Blood Supply: inferior gluteal artery

Action: lateral rotation

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Obturator internus

Insertion/Origin: pubic ramus to obturator membrane

Innervation: nerve to obturator internus

Blood Supply: inferior gluteal artery

Action: lateral rotation

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obturator externus

Insertion/Origin: -

Innervation: posterior branch of obturator nerve

Blood Supply: obturator artery

Action: lateral rotation, adduction

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Semitendinosus

Insertion/Origin: ischium to pes anserinus

Innervation: tibial divison of sciatic nerve

Blood Supply: inferior gluteal artery

Action: flexion of leg, extension of hip

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Semimembranosis

Insertion/Origin: ischium to tibia

Innervation: tibial division of sciatic nerve

Blood Supply: deep femoral

Action: flexion of leg and extension of thigh

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Biceps femrosi

Insertion/Origin: ischium (long head) and femur (short head) to fibula

Innervation: tibial nerve (long head) and common peroneal nerve (short head)

Blood Supply: gluteal arteries, perforating arteries, popliteal

Action: flexion of leg and extension of thigh (only long head)

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Popliteus

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Insertion/Origin: lateral femur to medial tibia

Innervation: tibial nerve

Blood Supply: popliteal artery

Action: rotates tibia medially when foot is off the ground, rotates femur laterally when foot is fixed

gastrocnemeus

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Insertion/Origin: chondyles of the femur to achilles tendon

Innervation: tibial nerve

Blood Supply: sural arteries

Action: plantar flexes foot, flexes knee

flexor digitorum longus

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Insertion/Origin: posterior tibia to plantar surface

Innervation: tibial nerve

Blood Supply: posterior tibial artery

Action: flex digits of foot

flexor hallicus longus

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Insertion/Origin: fibula to plantar surface

Innervation: tibial nerve

Blood Supply: peroneal branch of posterior tibial artery

Action: flexes big toe

Soleus

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Insertion/Origin: fibula to ankle

Innervation: tibial nerve

Blood Supply: sural arteries

Action: plantar flexion

tibialis posterior

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Insertion/Origin: tibia and fibula to navicular and medial cuneiform

Innervation: tibial nerve

Blood Supply: posterior tibial artery

Action: inversion and plantar flexion of foot

Peroneus longus/brevis

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Insertion/Origin: fibula to fifth metatarsal

Innervation: superficial peroneal

Blood Supply: peroneal artery

Action: plantarflexion/eversion

Extensor digitorum longus

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Insertion/Origin: lateral tibia to dorsal foot

Innervation: deep peroneal nerve

Blood Supply: anterior tibial artery

Action: extension of toes and dorsiflexion

Extensor hallicus longus

Insertion/Origin: fibula to big toe Innervation: deep peroneal nerve Blood Supply: anterior tibial artery Action: extends big toe and dorsiflexes foot

tibialis anterior

Insertion/Origin: lateral chondyle of tibia Innervation: deep peroneal Blood Supply: anterior tibial artery Action: dorsiflexion and inversion of the foot

Pectoralis major

Insertion/Origin: clavicle and sternum to bicipital groove of humerus Innervation: lateral and medial pectoral nerves Blood Supply: pectoral branch of thoracoacromial trunk Action: adducts and medially rotates humerus, draws scapula anteriorly and inferiorly clavicular head - flexes extended humerus sternocostal head - extend flexed humerus

pectoralis minor

Insertion/Origin: ribs to coracoid process Innervation: medial pectoral nerve Blood Supply: pectoral branch of thoracacromial trunk Action: draws scapula inferiorly and anteriorly (pulls forward-protraction)

subclavius

Insertion/Origin: rib to clavicle Innervation: nerve to subclavius Blood Supply: thoracoacromial trunk Action: depression of clavicle

serratus anterior

Insertion/Origin: ribs to anterior medial scapula Innervation: long thoracic nerve Blood Supply: - Action: protracts scapula and rotates scapula superiorly

Trapezius

Insertion/Origin: scapula to spine Innervation: spinal accessory (CN XI) Blood Supply: Action: elevates, retracts, depresses, rotates scapula

Latissiumus dorsi

Insertion/Origin: spinous process of vertebrae to intertubercular groove of humerus Innervation: thoracodorsal Blood Supply: Action: extends medially rotates, adducts humerus

Rhomboids

Insertion/Origin: spinous processes of vertebrae to medial end of scapula Innervation: dorsoscapular Blood Supply: Action: retracts, rotates inferiorly

levator scapulae

Insertion/Origin: skull to medial scapula Innervation: C3,4,5 Blood Supply: Action: elevates

supraspinatus

Insertion/Origin: superior scapula to greater tuberostiy of humerus Innervation: suprascapular nerve Blood Supply: Action: initiates abduction

infraspinatus

Insertion/Origin: posterior inferior scapula to greater tuberosity of humerus Innervation: suprascapular nerve Blood Supply: Action: laterally rotates

teres minor

Insertion/Origin: Innervation: axillary nerve Blood Supply: Action: laterally rotates

subscapularis

Insertion/Origin: Innervation: lower subscapular nerve Blood Supply: Action: medially rotates

deltoid

Insertion/Origin: Innervation: axillary nerve Blood Supply: Action: abducts arm, anterior part helps to flex arm, posterior part helps to extend arm

teres major

Insertion/Origin: Innervation: lower subscapular nerve Blood Supply: Action: extends, medially rotates, adducts

Muscle Review: Exam 1 Flashcards

(40 cards)