Anatomy - Lower Limb Muscles Flashcards
Iliacus - attachments
Origin - iliac fossa
Insertion - lesser trochanter of femur
Iliacus - innervation
Femoral nerve
Iliacus - actions
Flexion of hip
Psoas major - attachements
Origin - lumbar vertebrae
Insertion - lesser trochanter of femur
Psoas major - innervation
Anterior rami of L1-L3
Psoas major - actions
Flexion of hip
Muscles of quadratus femoris
Vastus lateralis
Vastus intermedius
Vastus medialis
Rectus femoris
Vastus lateralis - attachments
Origin - greater trochanter of femur
Insertion - ?
Vastus lateralis - innervation
Femoral nerve
Vastus lateralis - actions
Extension of knee
Vastus intermedius - attachments
Origin - anterior and lateral surfaces of femoral shaft
Insertion - ?
Vastus intermedialis - innervation
Femoral nerve
Vastus intermedius - actions
Extension of knee
Vastus medialis - attachments
Origin - intertrochanteric line and medial lip of linea aspera
Vastus medialis - innervation
Femoral nerve
Vastus medialis - actions
Extension of knee
Rectus femoris - attachments
Origin - anterior inferior iliac spine and area of ilum superior to acetabulim
Insertion - patella via quadriceps femoris tendon
Rectus femoris - innervation
Femoral nerve
Rectus femoris - actions
Flexion of hip
Extension of knee
Sartorius - attachments
Origin - anterior superior iliac spine
Insertion - superior, medial surface of tibia
Sartorius - innervation
Femoral nerve
Sartorius - actions
Flexion and abduction of hip
Flexion of knee
Pectineus - attachments
Origin - pectineal line on anterior surface of pelvis
Insertion - pectineal line on posterior side of femur
Pectineus - innervation
Femoral nerve
Pectineus - actions
Adduction and flexion of hip
Adductor magnus - attachments
- Origin
- Adductor part - inferior rami of rubis
- Hamstring part - ischial tuberosity
- Insertion
- Adductor part - linea aspera of femur
- Hamstring part - adductor tubercle and medial supracondylar line of femur
Adductor magnus - innervation
Adductor part - obturator nerve
Hamstring part - tibial component of sciatic nerve
Adductor magnus - actions
Both components adduct hip, adductor components also flexes hip and hamstring portion extends hip
Adductor longus - attachments
Origin - pubis
Insertion - linea aspera of femur
Adductor longus - innervation
Obturator nerve
Adductor longus - actions
Adduction of thigh
Adductor brevis - attachments
Origin - body of pubis
Insertion - linea aspera on posterior surface of femur
Adductor brevis - innervation
Obturator nerve
Adductor brevis - actions
Adduction of hip
Obturator externus - attachments
Origin - membrane of obturator foramen
Insertion - posterior aspect of greater trochanter
Obturator externus - innervation
Obturator nerve
Obturatory externus - actions
Adduction and lateral rotation of hip
Gracilis - attachments
Origin - inferior rami of pubis
Insertion - medial surface of tibia
Gracilis - innervation
Obturator nerve
Gracilis - actions
Adduction of hip
Flexion of knee
Gluteus maximus - attachments
Origin - posterior surface ileum, sacrum and coccyx
Insertion - Iliotibial tract and gluteal tuberosity of femur
Gluteus maximus - innervation
Inferior gluteal nerve
Gluteus maximus - actions
Extension of hip
Lateral roation
Gluteus medius - attachments
Origin - gluteal surface of ileum
Insertion - lateral surface of greater trochanter
Gluteus medius - innervation
Superior gluteal nerve
Gluteus medius - actions
Adduction and medial rotation of hip
Gluteus minimus - attachments
Origin - ileum
Insertion - anterior side greater trochanter
Gluteus minimus - innervation
Superior gluteal nerve
Gluteus minimus - actions
Abduction and medial rotation of hip
Tensor fascia lata - attachments
Origin - anterior iliac crest
Insertion - iliotibial tract which attaches to lateral condyle of tibia
Tensor fascia lata - innervation
Superior gluteal nerve
Tensor fascia lata - actions
Adduction and medial rotation of hip
Piriformis - attachments
Origin - anterior surface of sacrum
Insertion - greater trochanter of femur
Piriformis - innervation
Nerve to piriformis
Piriformis - actions
Lateral rotation and abduction
Obturator internus - attachments
Origin - pubis and ischiul at obturator foramen
Insertion - travels through lesser sciatic foramen to greater trochanter of femur
Obturator internus - innervation
Nerve to obturator internus
Obturator internus - actions
Lateral rotation and abduction of hip
Biceps femoris - attachments
- Origin
- Long head - ischial tuberosity of pelvis
- Short head - linea aspera on posterior surface femur
- Insertion
- Head of fibula
Biceps femoris - innervation
Long head - tibial part of sciatic nerve
Short head - common fibular part of sciatic nerve
Biceps femoris - actions
Flexion of knee
Extension of hip
Lateral rotation of hip and knee
Semitendinosus - attachments
Origin - ischial tubersity of pelvis
Insertion - medial surface tibia
Semitendinosus - innervation
Tibial part of sciatic nerve
Semitendinosus - actions
Flexion of knee
Extension of hip
Medial rotation of hip and knee
Semimembranosus - attachments
Origin - ischial tuberosity
Insertion - medial tibial condyle
Semimembranosus - innervation
Tibial part of sciatic nerve
Semimembranosus - actions
Flexion of knee
Extension of hip
Medial rotation of hip and knee
Tibialis anterior - attachments
Origin - lateral surface tibia
Insertion - medial cuneiform and base of metatarsal I
Tibialis anterior - innervation
Deep fibular nerve
Tibialis anterior - actions
Dorsoflexion and inversion of ankle
Extensor digitorum longus - attachments
Origin - lateral condyle of tibia and medial surface fibula
Insertion - dorsal surface of foot, splits into 4 for each toe (apart from big)
Extensor digitorum longus - actions
Extension of lateral 4 toes
Dorsiflexion of foot
Extensor digitorum longus - innervation
Deep fibular nerve
Extensor hallucis longus - attachments
Origin - medial surface fibular shaft
Insertion - distal phalanx of great toe
Extensor hallucis longus - innervation
Deep fibular nerve
Extensor hallucis longus - action
Extension of great toe
Dorsiflexion of ankle
Fibularis tertius - attachments
Origin - medial surface of fibula
Insertion - metatarsal V
Fibularis tertius - innervation
Deep fibular nerve
Fibularis tertius - actions
Eversion and dorsiflexion of foot
Gastrocnemius - attachments
- Origin
- Lateral head - lateral femoral condyle
- Medial head - medial femoral condyle
- Insertion
- Combines with soleus to form cacaneal tendon inserting onto calcaneus
Gastrocnemius - innervation
Tibial nerve
Gastrocnemius - actions
Plantarflexion of ankle
Flexion of knee
Plantaris - attachments
Origin - lateral supracondylar line of femur
Insertion - calcaneal tendon
Plantaris - innervation
Tibial nerve
Plantaris - actions
Plantarflexion of ankle
Flexion of knee
Soleus - attachments
Origin - soleal line of tibia and proximal fibular area
Insertion - calcaneal tendon
Soleus - innervation
Tibial nerve
Soleus - actions
Plantarflexion of ankle
Poplitus - attachments
Origin - lateral condyle of femur
Insertion - tibia
Popliteus - innervation
Tibial nerve
Popliteus - actions
Lateral rotation of femur on tibia, unlocking the knee so flexion can occur
Tibialis posterior - attachments
Origin - interosseous membrane between tibia and fibula
Insertion - plantar surface of medial tarsal bones
Tibialis posterior - innervation
Tibial nerve
Tibialis posterior - actions
Inversion and plantarflexion of ankle
Maintains medial arch of foot
Flexor digitorum longus - attachments
Origin - medial surface tibia
Insertion - plantar surface of lateral 4 digits
Flexor digitorum longus - innervation
Tibial nerve
Flexor digitorum longus - actions
Flexion of lateral toes
Flexor hallucis longus - attachments
Origin - posterior surface tibia
Insertion - plantar surface of phalanx of great toe
Flexor hallucis longus - innervation
Tibial nerve
Flexor hallucis longus - actions
Flexion of great toe
Fibularis longus - attachments
Origin - superior and lateral surface of fibula and lateral tibial condyle
Insertion - medial cuneiform and base of metatarsal I
Fibularis longus - innervation
Superficial fibular (peroneal) nerve
Fibularis brevis - attachments
Origin - inferolateral surface fibular shaft
Insertion - tubercle on metatarsal V
Fibularis longus - actions
Eversion and plantarflexion of ankle
Supports lateral and transverse arches of foot
Fibularis brevis - innervation
Superficial fibular (peroneal) nerve
Fibularis brevis - actions
Eversion of foot
Abductor hallucis - actions
Abduction and flexion of great toe
Abductor hallucis - innervation
Medial plantar nerve
Flexor digitorum brevis - actions
Flexion of lateral 4 digits at PIPJ
Flexor digitorum brevis - innervation
Medial plantar nerve
Abductor digiti minimi - actions
Abduction and flexion of 5th digit
Abductor digiti minimi - innervation
Lateral plantar nerve
1st layer of foot muscles
Abductor hallucis
Flexor digitorum brevis
Abductor digiti minimi
2nd layer foot muscles
Quadratus plantae
Lumbricals
Quadratus plantae - actions
Flexion of lateral digits
Quadratus plantae - innervation
Lateral plantar nerve
Lumbricals - actions
Flexion at metatarsophalangeal joints
Extesion at interphalangeal joints
Lumbricals - innervation
Medial lumbrical - medial plantar nerve
Rest - lateral plantar nerve
3rd layer of foot muscles
Flexor hallucis brevis
Adductor hallucis
Flexor digiti minimi brevis
Flexor hallucis brevis - actions
Flexion of proximal phalanx of great toe at metatarsophalangeal joint
Flexor hallucis brevis - innervation
Medial plantar nerve
Adductor hallucis - actions
Adducts of great toe
Assists in forming transverse arch of foot
Adductor hallucis - innervation
Deep branch of lateral plantar nerve
Flexor digiti minimi brevis - actions
Flexiono of proximal phalanx of 5th digit
Flexor digiti minimi brevis - innervation
Superficial branch of lateral plantar nerve
4th later foor muscles
Plantar interossei
Dorsal interossei
Plantar interossei - actions
Adduction of digits 3 to 5
Flexion of metatarsophalangeal joints
Plantar interossei - innervation
Lateral plantar nerve
Dorsal interossei - actions
Abducts of digits 2 to 4 and flexion at metatarsophalngeal joints
Dorsal interossei - innervation
Lateral plantar nerve