Lower Extremity Muscles, Actions And Innervations

Front 1

RECTUS FEMORIS

Back 1

EXTEND KNEE (ASSISTS ILIOPSOAS TO FLEX THIGH)
P: FEMORAL N.
S: L2,3,4

Hint 1

P: FEMORAL N.
S: L2,3,4

Front 2

VASTUS MEDIALIS

Back 2

EXTEND KNEE
P: FEMORAL N.
S: L2,3,4

Hint 2

P: FEMORAL N.
S: L2,3,4

Front 3

VASTUS LATERALIS

Back 3

EXTEND KNEE
P: FEMORAL N.
S: L2,3,4

Hint 3

P: FEMORAL N.
S: L2,3,4

Front 4

VASTUS INTERMEDIUS

Back 4

EXTEND KNEE
P: FEMORAL N.
S: L2,3,4

Hint 4

P: FEMORAL N.
S: L2,3,4

Front 5

SARTORIUS

Back 5

HIP FLEXION, ABDUCTION, LATERAL ROTATION
FLEX & ASSIST MEDIAL ROTATION OF KNEE
P: FEMORAL N.
S: L2,3,(4)

Hint 5

P: FEMORAL N.
S: L2,3,(4)

Front 6

TENSOR OF FASCIA LATA

Back 6

HIP ABDUCTION, MEDIAL ROTATION, FLEXION
ASSIST KNEE EXTENSION
TENSES FASCIA LATA
P: SUPERIOR GLUTEAL N.
S: L4,5, S1

Hint 6

P: SUPERIOR GLUTEAL N.
S: L4,5, S1

Front 7

ILIOPSOAS

Back 7

FLEXES HIP
ASSIST IN HIP LATERAL ROTATION & ABDUCTION
WITH FIXED INSERTION: FLEXES TRUNK, INCREASES LUMBAR LORDOSIS
UNILATERALLLY: ASSIST TRUNK LATERAL FLEXION, SAME SIDE
CONTRIBUTES TO ANTERIOR SHEAR OF LUMBAR SPINE IF TRUNK IS STABLE
P: PSOAS MAJOR-- ANTERIOR RAMI OF LUMBAR SPINAL N.
ILIACUS-- FEMORAL N.
S: L(1),2,3,(4)

Hint 7

P: PSOAS MAJOR-- ANTERIOR RAMI OF LUMBAR SPINAL N.
ILIACUS-- FEMORAL N.
S: L(1),2,3,(4)

Front 8

PECTINIUS

Back 8

HIP ADDUCTION AND FLEXION
P: FEMORAL N., ACCESSORY OBTURATOR
S: L2,3,(4)

Hint 8

P: FEMORAL N., ACCESSORY OBTURATOR
S: L2,3,(4)

Front 9

ADDUCTOR LONGUS

Back 9

HIP ADDUCTION AND FLEXION
P: OBTURATOR N.
S: L2,3,(4)

Hint 9

P: OBTURATOR N.
S: L2,3,(4)

Front 10

ADDUCTOR BREVIS

Back 10

HIP ADDUCTION AND FLEXION
P: OBTURATOR N.
S: L2,3,4

Hint 10

P: OBTURATOR N.
S: L2,3,4

Front 11

ADDUCTOR MAGNUS

Back 11

HIP ADDUCTION, FLEXION, EXTENSION
OBTURATOR N., L(2),3,4
TIBIAL DIVISION OF SCIATIC N. L4,(5), S1

Hint 11

OBTURATOR N., L(2),3,4
TIBIAL DIVISION OF SCIATIC N. L4,(5), S1

Front 12

GRACILIS

Back 12

ADDUCT HIP, ASSIST KNEE MR AND FLEXION
OBTURATOR N.
L2,3,4

Hint 12

OBTURATOR N.
L2,3,4

Front 13

OBTURATOR EXTERNUS

Back 13

HIP LR, ASSIST HIP ADDUCTION
OBTURATOR N.
L3,4

Hint 13

OBTURATOR N.
L3,4

Front 14

GLUTEUS MAXIMUS

Back 14

HIP EXTENSION, LR
LOWER FIBERS: ASSIST HIP ADDUCTION, STABILIZE KNEE IN EXTENSION THROUGH IT B INSERTION
INFERIOR GLUTEAL
L5, S1,2

Hint 14

INFERIOR GLUTEAL
L5, S1,2

Front 15

GLUTEUS MEDIUS

Back 15

ABDUCT HIP
ANTERIOR FIBERS: HIP MR AND ASSIST WITH HIP FLEXION
POSTERIOR FIBERS: HIP LR AND ASSIST WITH HIP EXTENSION
SUPERIOR GLUTEAL
L4,5 S1

Hint 15

SUPERIOR GLUTEAL
L4,5 S1

Front 16

GLUTEUS MINIMUS

Back 16

HIP ABDUCTION, MR
ASSIST WITH HIP FLEXION
SUPERIOR GLUTEAL
L4,5 S1

Hint 16

SUPERIOR GLUTEAL
L4,5 S1

Front 17

PIRIFORMIS

Back 17

LATERALLY ROTATE EXTENDED HIP
FLEX ABDUCTED HIP
ASSIST HIP EXTENSION
STABILIZE FEMORAL HEAD IN ACETABULUM
SACRAL PLEXUS N. TO PIRIFORMIS
L(5) S1,2

Hint 17

SACRAL PLEXUS N. TO PIRIFORMIS
L(5) S1,2

Front 18

SUPERIOR GEMELLI

Back 18

LR EXTENDED HIP
ABDUCT FLEXED HIP
STABILIZE FEMORAL HEAD IN ACETABULUM
SACRAL PLEXUS N. TO SUPERIOR GEMELLI
L5 S1,2

Hint 18

SACRAL PLEXUS N. TO SUPERIOR GEMELLI
L5 S1,2

Front 19

INFERIOR GEMELLI

Back 19

LR EXTENDED HIP
ABDUCT FLEXED HIP
STABILIZE FEMORAL HEAD IN ACETABULUM
SACRAL PLEXUS N. TO INFERIOR GEMELLI
L4,5 S1,(2)

Hint 19

SACRAL PLEXUS N. TO INFERIOR GEMELLI
L4,5 S1,(2)

Front 20

OBTURATOR INTERNUS

Back 20

LR EXTENDED HIP
ABDUCT FLEXED HIP
STABILIZE FEMORAL HEAD IN ACETABULUM
SACRAL PLEXUS N. TO OBTURATOR INTERNUS
L5 S1,2

Hint 20

SACRAL PLEXUS N. TO OBTURATOR INTERNUS
L5 S1,2

Front 21

QUADRATUS FEMORIS

Back 21

LR EXTENDED HIP
ABDUCT FLEXED HIP
STABILIZE FEMORAL HEAD IN ACETABULUM
SACRAL PLEXUS N. TO QUADRATUS FEMORIS
L4,5 S1,(2)

Hint 21

SACRAL PLEXUS N. TO QUADRATUS FEMORIS
L4,5 S1,(2)

Front 22

BICEPS FEMORIS LONG HEAD

Back 22

KNEE FLEXION, LR
HIP EXTENSION
ASSIST IN HIP LR
TIBIAL
L(5) S1,2,(3)

Hint 22

TIBIAL
L(5) S1,2,(3)

Front 23

BICEPS FEMORIS SHORT HEAD

Back 23

KNEE FLEXION, LR
COMMON PERONEAL
L5, S1,2

Hint 23

COMMON PERONEAL
L5, S1,2

Front 24

SEMITENDINOSIS

Back 24

KNEE FLEXION, MR
EXTEND HIP
ASSIST HIP MR
TIBIAL
L(4), 5, S1,2

Hint 24

TIBIAL
L(4), 5, S1,2

Front 25

SEMIMEMBRANOSIS

Back 25

KNEE FLEXION, MR
EXTEND HIP
ASSIST HIP MR
TIBIAL
L(4), 5, S1,(2)

Hint 25

TIBIAL
L(4), 5, S1,(2)

Front 26

GASTROCNEMIUS-MEDIAL HEAD

Back 26

TALOCRURAL PLANTAR FLEXION
ASSIST KNEE FLEXION
SUBTALOR JOINT INVERSION (SUPINATION)
TIBIAL
S1,2

Hint 26

TIBIAL
S1,2

Front 27

GASTROCNEMIUS-LATERAL HEAD

Back 27

TALOCRURAL PLANTAR FLEXION
ASSIST KNEE FLEXION
TIBIAL
S1,2

Hint 27

TIBIAL
S1,2

Front 28

PLANTARIS

Back 28

PLANTAR FLEXION
ASSIST KNEE FLEXION
TIBIAL
L(4), 5, S1,(2)

Hint 28

TIBIAL
L(4), 5, S1,(2)

Front 29

SOLEUS

Back 29

TALOCRURAL PLANTAR FLEXION
SUBTALOR JOINT INVERSION (SUPINATION)
TIBIAL
L(5), S1,2

Hint 29

TIBIAL
L(5), S1,2

Front 30

FLEXOR HALLUCIS LONGUS

Back 30

GREAT TOE IP FLEXION
ASSIST MP FLEXION
PLANTAR ANKLE FLEXION
FOOT INVERSION
TIBIAL
L5, S1,2

Hint 30

TIBIAL
L5, S1,2

Front 31

FLEXOR DIGITORUM LONGUS

Back 31

PROXIMAL AND DISTAL IP AND MP FLEXION OF DIGITS 2-5
ASSISTS PLANTAR FLEXION AND INVERSION
TIBIAL
L5, S1,(2)

Hint 31

TIBIAL
L5, S1,(2)

Front 32

TIBIALIS POSTERIOR

Back 32

INVERSION
ASSIST ANKLE PANTAR FLEXION
TIBIAL
L(4),5, S1

Hint 32

TIBIAL
L(4),5, S1

Front 33

POPLITEUS

Back 33

NWB: MR OF TIBIA ON FEMUR, KNEE FLEXION
WB: LR FEMUR ON TIBIA AND KNEE FLEXION
HELPS REINFORCE POSTERIOR LIGAMENT OF KNEE
TIBIAL
L(4),5, S1

Hint 33

TIBIAL
L(4),5, S1

Front 34

EXTENSOR HALLUCIS LONGUS

Back 34

GREAT TOE IP AND MTP EXTENSION
ASSIST INVERSION OF FOOT AND DF OF ANKLE
FIBULAR (DEEP PERONEAL)
L(4),5, S1

Hint 34

FIBULAR (DEEP PERONEAL)
L(4),5, S1

Front 35

EXTENSOR DIGITORUM BREVIS

Back 35

EXTEND MTP OF DIGITS 1-4
ASSIST EXTENSION OF IP JOINTS OF DIGITS 2-4
FIBULAR (DEEP PERONEAL)
L(4),5, S1

Hint 35

FIBULAR (DEEP PERONEAL)
L(4),5, S1

Front 36

TIBIALIS ANTERIOR

Back 36

ANKLE DORSIFLEXION
ASSIST INVERSION
FIBULAR (DEEP PERONEAL)
L4,5, S(1)

Hint 36

FIBULAR (DEEP PERONEAL)
L4,5, S(1)

Front 37

EXTENSOR DIGITORUM LONGUS

Back 37

EXTEND MTP JOINTS
ASSIST EXTENSION OF IP 2-5, DF AND EV
FIBULAR (DEEP PERONEAL)
L4,5, S1

Hint 37

FIBULAR (DEEP PERONEAL)
L4,5, S1

Front 38

FIBULARIS TERTIUS

Back 38

ANKLE DORSIFLEXION
FOOT EVERSION
FIBULAR (DEEP PERONEAL)
L4,5, S1

Hint 38

FIBULAR (DEEP PERONEAL)
L4,5, S1

Front 39

EXTENSOR HALLUCIS BREVIS

Back 39

GREAT TOE MTP EXTENSION
FIBULAR (DEEP PERONEAL)
L(4),5, S1

Hint 39

FIBULAR (DEEP PERONEAL)
L(4),5, S1

Front 40

ABDUCTOR HALLUCIS

Back 40

GREAT TOE ABDUCTION OF MTP
ASSIST IN FLEXION
ASSIST ADDUCTION OF FOREFOOT
MEDIAL PLANTAR
L(4),5, S1

Hint 40

MEDIAL PLANTAR
L(4),5, S1

Front 41

ADDUCTOR HALLUCIS

Back 41

ADDUCTION
ASSIST GREAT TOE FLEXION OF MTP
LATERAL PLANTAR
S1,2

Hint 41

LATERAL PLANTAR
S1,2

Front 42

ABDUCTOR DIGITI MINIMI

Back 42

FLEXES 5TH TOE
ASSIST WITH ABDUCTION
LATERAL PLANTAR
S1,2

Hint 42

LATERAL PLANTAR
S1,2

Front 43

INTEROSSEI

Back 43

PLANTAR (3)- ADDUCTION DIGITS 3-5 TOWARD AXIAL LINE THROUGH THE 2ND DIGIT
ASSIST MTP FLEXION
ASSIST EXTENSION OF IP 3-5
DORSAL (4)- ABDUCT DIGITS 2-4 FROM AXIAL LINE THROUGH 2ND DIGITS
ASSIST MTP FLEXION AND EXTENSION OF 2-4 IP
LATERAL PLANTAR
S1,2

Hint 43

LATERAL PLANTAR
S1,2

Front 44

FIBULARIS LONGUS

Back 44

EVERSION
ASSIST PLANTAR FLEXION AND DEPRESSES FIRST METATARSAL HEAD
SUPERFICIAL FIBULAR
L(4),5, S1

Hint 44

SUPERFICIAL FIBULAR
L(4),5, S1

Front 45

FLEXOR DIGITI MINIMI BREVIS

Back 45

FLEX 5TH TOE AT MTP
LATERAL PLANTAR
L4,5, S1,2,3

Hint 45

LATERAL PLANTAR
L4,5, S1,2,3

Front 46

FLEXOR DIGITORUM BREVIS

Back 46

PIP FLEXION
ASSIST FLEXION OF 2-5TH MTP
MEDIAL PLANTAR
L(4), 5, S1

Hint 46

MEDIAL PLANTAR
L(4), 5, S1

Front 47

FIBULARIS BREVIS

Back 47

EVERSION
ASSIST PLANTAR FLEXION
SUPERFICIAL FIBULAR
L(4),5, S1

Hint 47

SUPERFICIAL FIBULAR
L(4),5, S1

Front 48

QUADRATUS PLANTAE

Back 48

MODIFIES LINE OF PULL OF THE FLEXOR DIGITORUM LONGUS TENDONS, AND ASSISTS FLEXION OF 2-5TH DIGITS
LATERAL PLANTAR
S1,2

Hint 48

LATERAL PLANTAR
S1,2

Front 49

LUMBRICALS

Back 49

MTP FLEXION
ASSIST IN IP EXTENSION 2-5TH
DIGIT 1-MEDIAL PLANTAR N.
L(4),5 S1
DIGITS 2-4 LATERAL PLANTAR N.
L(4),(5), S1,2

Hint 49

DIGIT 1-MEDIAL PLANTAR N.
L(4),5 S1
DIGITS 2-4 LATERAL PLANTAR N.
L(4),(5), S1,2

Front 50

FLEXOR HALLUCIS BREVIS

Back 50

GREAT TOE FLEXION OF MTP
MEDIAL PLANTAR
L(4), 5 S1

Hint 50

MEDIAL PLANTAR
L(4), 5 S1