Lower Limb Muscles Flashcards
Psoas major muscle Attachments
Origin: Lateral vertebral bodies T12 through L5
Insertion:Lesser trochanter of femur
Psoas major muscle innervation
Anterior rami
Psoas Major muscle action
Flex thigh
Iliacus muscle attachments
Origin: superior iliac fossa
Insertion:Lesser trocanter of femur
Iliacus muscle innervation
Femoral nerve
Iliacus muscle action
Flexed thigh
Sartorius muscle attachments
Origin: ASIS
Insertion: Pes Anserinus
Sartorius muscle innervation
Femoral nerve
Sartorius muscle action
Flex, abduct, laterally rotate thigh; flex leg
Rectus femoris muscle Attachments
Origin: AIIS
Insertion:Tibial tuberosity
Rectus femoris muscle innervation
Femoral nerve
Rectus femoris muscle action
Flex thigh,Extend legs
Vastus lateralis muscle attachments
Origin: shaft of the femur
Insertion:Tibial tuberosity
Vastus lateralis muscle innervation
Femoral N
Vastus lateralis muscle action
Extended legs
Vastus intermedius muscle attachments
Origin: Shaft of the femur
Insertion: Tibial tuberosity
Vastus intermedius Innervation
Femoral N
Vastus intermedius Action
Extend legs
Vastus medialis muscle attachments
Origin: Shaft of the femur
Insertion: Tibial tuberosity
Vastus medialis muscle innervation
Femoral N
Vastus medialis muscle action
Extend legs
Articularis Genu Attachments
Origin: Anterior Surface of distal femur
Insertion: Articular capsule of the knee
Articularis Genu Action
Tightens capsule of the knee during leg extension
Articularis Genu Innervation
Femoral N
Gluteus maximus muscle attachments
Origin: ilium, Dorsal sacrum, coccyx, Sacrotuberous ligament
Insertion:Gluteal tuberosity, Lateral tibial condyle
Gluteus Maximus muscle action
Extended thigh an assist in lateral rotation
Gluteus Maximus muscle innervation
Inferior gluteal nerve
Gluteus Medius attachments
Origin: Ilium
Insertions: lateral aspect of greater trochanter of femur
Gluteus Medius muscle action
Abduct and medially rotate thigh
Gluteus Medius muscle innervation
Superior Gluteal N
Gluteus Minimus attachments
Origin: Ilium
Insertion: Anterior aspect greater trochanter of femur
Gluteus Minimus action
Abduct, medially rotate and flex thigh
Gluteus Minimus Innervation
Superior Gluteal N
Tensor Fascia Lata attachments
Origin: ASIS
Insertion: IT Tract and lateral tibial condyle
Tensor Fascia Lata Action
Abduct, medially rotate and flex thigh
Tensor Fascia Lata innervation
Superior Gluteal N
Piriformis Attachments
Origin: anterior surface sacrum
Insertion: Superior aspect greater trochanter femur
Piriformis action
Laterally rotate extended thigh, Abduct flexed thigh
Piriformis Innervation
Nerve to the piriformis
Superior Gemellus Attachment
Origin: ischial spine
Insertion:Medial aspect greater Trochanter of femur
Superior Gemellus Action
Laterally rotate extended thigh, Abduct flexed thigh
Superior Gemellus Innervation
Nerve to the obturator internus
Inferior Gemellus Attachments
Origin: Ischial tuberosity
Insertion: Medial aspect of great trochanter
Inferior Gemellus Action
Laterally rotate extended thigh, abduct flexed thigh
Inferior Gemellus Innervation
Nerve to quadratus femoris
Quadratus Femoris attachments
Origin: lateral aspect of ischial tuberosity
Insertion: Quadrate tubercle on intertrochanteric crest
Quadratus Femoris Action
laterally rotate thigh
Quadratus Femoris Innervation
Nerve to Quadratus Femoris
Quadratus Externus attachments
Origin: margin of obturator foramen
Insertion: Trochanteric fossa of femur
Quadratus Externus action
Laterally rotate thigh
Quadratus Externus innervation
Obturator N
Obturator Internus attachment
Origin: Pelvic surfaces of the ilium and ischium and obturator membrane
Insertion: Greater trochanter of the femur
Obturator Internus action
laterally rotate thigh, abduct flexed thigh
Obturator Internus innervation
nerve to the obturator
Pectineus attachments
Origin: Superior pubic ramus
Insertion: Pectineal line of the femur
Pectineus action
Adduct and flex thigh
Pectineus innervation
Femoral N
Adductor Longus attachments
origin: body of pubis
insertion: middle 1/3 of the linea apsera
Adductor Longus action
Adduct thigh
Adductor Longus innervation
Anterior division of obturator N
Adductor Brevis attachments
Origin: Body and inferior pubic ramus
Insertion: Pectineal line
Adductor Brevis actions
Adduct thigh
Adductor Brevis innervation
Anterior division of obturator N
Adductor Magnus attachments
Origin: ischiopubic ramus and ischial tuberosity
Insertion: Gluteal tuberosity
Adductor Magnus actions
Adduct, flex, extend thigh
Adductor Magnus innervation
Upper fibers: posterior division obturator N
Lower fibers: tibial division sciatic N
Gracilis attachments
origin: inferior pubic rami and body of pubis
Insertion: Medial aspect proximal end of tibia
Gracilis Action
Adduct the thigh and assist in medial thigh rotation, flex the leg
Gracilis Innervation
Anterior division of obturator N
Biceps Femoris attachments
Origin 1. Long head: ischial tuberosity 2. Short head: linea aspera and lateral supracondylar line Insertion Lateral aspect fibular head
Biceps Femoris action
Both heads: flex and laterally rotate leg when flexed
Long head: extend thigh
Biceps Femoris innervation
Long Head: tibial division of sciatic N
Short Head: common fibular division of sciatic N
Semitendinosus attachments
Origin: Ischial Tuberosity
Insertion: Medial aspect proximal end of tibia
Semitendinosus Action
extend thigh, flex and medially rotate leg
Semitendinosus innervation
Tibial division of sciatic N
Semimembranosus attachments
Origin: Ischial Tuberosity
Insertion: Posterior aspect medial tibial condyle
Semimembranosus action
extend thigh, flex and medially rotate leg when flexed
Semimembranosus Innervation
Tibial division of sciatic N
Tibialis Anterior attachments
Origin: Lateral tibial condyle, interosseous membrane
Insertion: inferomedial aspect medial cuneiform and base of 1st metatarsal
Tibialis Anterior action
dorsiflex the foot, invert the foot
Tibialis Anterior innervation
Deep Fibular N
Extensor Hallicus Longus attachments
Origin: Anterior aspect fibula, interosseous membrane
Insertion: Dorsum of base of 1st distal phalanx
Extensor Hallicus Longus action
Extend hallux, dorsiflex foot
Extensor Hallicus Longus innervation
Deep fibular N
Extensor Digitorum Longus attachments
Origin: lateral tibial condyle, medial aspect of fibula and interosseous membrane
Insertion: 2nd-5th middle and distal phalanges
Extensor Digitorum Longus action
extend digits 2-5 and dorsiflex foot
Extensor Digitorum Longus innervation
deep fibular N
Fibularis Tertius attachments (variable in humans)
Origin: Anterioinferior aspect of fibula and interosseous membrane
Insertion: Dorsal aspect base of 5th metatarsal
Fibularis Tertius Action
Dorsiflex foot, assist in eversion of foot
Fibularis Tertius Innervation
Deep fibular N
Fibularis Longus attachments
Origin: Head and superior aspect of fibula
Insertion: Base of 1st metatarsal and medial cuneiform
Fibularis Longus action
Evert foot, plantarflexion
Fibularis Longus Innervation
Superficial fibular N
Fibularis Brevis attachments
Origin: inferolateral aspect of fibula
Insertion: Tuberosity of base of 5th metatarsal
Fibularis Brevis action
Evert foot, plantarflexion
Fibularis Brevis innervation
Superficial fibular N
Gastrocnemius attachments
Origin
Lateral head: lateral aspect lateral femoral condyle
Medial head: popliteal surface above medial femoral condyle
Insertion: posterior calcaneous via calcaneal tendon
Gastrocnemius action
Plantarflexion, elevate heel, flex leg
Gastrocnemius innervation
tibial N
Soleus attachments
Origin: posterior aspect head and body of fibula, soleal line
insertion: Posterior calcaneus via calcaneal tendon
Soleus action
plantarflexion of foot
Soleus innervation
Tibial N
Plantaris attachments
Origin: inferior lateral supracondylar line and oblique popliteal l
Plantaris action
weakly assist in plantarflexion and flexing the knee
Plantaris innervation
Tibial N
Popliteus attachments
Origin: lateral aspect of lateral femoral condyle and lateral meniscus
Insertion: posterior aspect tibia superiomedial to the soleal line
Popliteus action
weakly flex the knee
Popliteus innervation
Tibial N
Flexor Hallicus Longus attachments
Origin: Posteriorinferior fibula and interosseous membrane
Insertion: Base of 1st distal phalanx
Flexor Hallicus Longus action
flex hallux
Flexor Hallicus longus innervation
Tibial N
Flexor Digitorum Longus attachments
Origin: Posteriomedial tibia inferior to soleal line
Insertion: Base of 2nd-5th distal phalanges
Flexor Digitorum Longus action
Flex digits 2-5, plantarflex
Flexor Digitorum Longus innervation
Tibial N
Tibialis Posterior attachments
Origin: Posterior fibula and tibia inferior to soleal line and interosseus membrane
Insertion: Tuberosity of the navicular, medial and intermediate cuneiforms, bases of 3rd-5th metatarsals
Tibialis Posterior Action
Plantarflexion and inversion
Tibialis Posterior innervation
Tibial N
