OINAS Flashcards
MA: Pectineus
Adduct and slightly flex hip joint;
assists with lateral rotation
PA: Pectineus
Superior ramus of pubis
DA: Pectineus
Pectineal line of femur
N: Pectineus
Femoral nerve (L2, L3)
May receive a branch from obturator n.
MA: sartorius
Flexes, abducts, and laterally rotates hip joint;
Flex knee (medially rotate leg when knee flexed)
PA: Sartorius
ASIS
DA: Sartorius
pes anserine of tibia
N: Sartorius
Femoral n. (L2, L3)
MA: Gluteus Maximus
Extends hip (especially from flexed position)
Assists in lateral rotation
Fixes hip joint
Assists in rising from sitting position
PA: Gluteus Maximus
posterior gluteal line of ilium
Dorsal sacrum and coccyx
Sacrotuberous ligament
DA: Gluteus Maximus
Most fibers end in iliotibial tract, which inserts into anterolateral tibial tubercle
Some fibers insert on gluteal tuberosity
IT band will also be accepted
N: Gluteus Maximus
Inferior gluteal nerve (L5, S1, S2)
MA: Gluteus Medius
Abduct and medially rotate hip joint
Posterior fibers externally rotate (clam)
Keeps pelvis level when ipsilateral limb is weight bearing and advance opposite (unsupported) side during its swing phase.
PA: Gluteus Medius
ilium between anterior and posterior gluteal lines
DA: Gluteus Medius
greater trochanter
N: Gluteus Medius
Superior gluteal nerve (L5, S1, S2)
MA: Gluteus Minimus
Abduct and medially rotate hip joint
keep pelvis level when ipsilateral limb is weight bearing and advance opposite (unsupported) side during its swing phase
PA: Gluteus Minimus
ilium between anterior and inferior gluteal lines
DA: Gluteus Minimus
greater trochanter
N: Gluteus Minimus
Superior gluteal n. (L4, L5, S1)
MA: Tensor Fasciae Latae
Medially rotate hip joint!
Abduct hip joint
Keep pelvis level when ipsilateral limb is weight bearing and advance opposite (unsupported) side during its swing phase.
PA: Tensor Fasciae Latae
ASIS
Anterior iliac crest
DA: Tensor Fasciae Latae
Iliotibial tract, which attaches to anterolateral tibial triangle
IT band also accepted
N: Tensor Fasciae Latae
Superior gluteal n. (L4, L5, S1)
MA: Piriformis
Laterally rotate extended hip joint
abduct hip joint when flexed
stabilize hip joint
PA: Piriformis
Anterior sacrum
ST ligament
DA: Piriformis
greater trochanter
N: Piriformis
Anterior rami of S1 and S2
MA: Obturator Internus
Laterally rotate extended hip joint
abduct hip joint when flexed
stabilize hip joint
PA: Obturator Internus
Pelvic surface of obturator membrane surrounding bones
DA: Obturator Internus
greater trochanter
N: Obturator Internus
Nerve to obturator internus (L5, S1)
MA: Superior and Inferior Gemelli
Laterally rotate extended hip joint
abduct hip joint when flexed
stabilize hip joint
PA: Superior and Inferior Gemelli
Superior: ischial spine
Inferior: ischial tuberosity
DA: Superior and Inferior Gemelli
greater trochanter
N: Superior and Inferior Gemelli
Superior gemellus: nerve to obturator Internus (L5, S1)
Inferior gemellus: nerve to quadratus femoris (L5, S1)
MA: Quadratus Femoris
Laterally rotates hip joint
Stabilizes hip joint
PA: Quadratus Femoris
ischial tuberosity
DA: Quadratus Femoris
Quadrate tubercle (distal to greater trochanter)
N: Quadratus Femoris
Nerve to quadratus femoris (L5, S1)
Ma: Adductor longus
Adducts hip
PA: Adductor Longus
Body of pubis
DA: Adductor Longus
linea aspera of femur
N: Adductor Longus
Obturator nerve (L2, L3, L4)
MA: Adductor Brevis
Adducts hip joint
To some extent flexes it
PA: Adductor brevis
Body and inferior ramus of pubis
DA: Adductor brevis
Pectineal line
linea aspera of femur
N: Adductor Brevis
Obturator nerve (L2, L3, L4)
MA: Adductor Magnus
Adducts hip joint
Adductor part: flexes hip joint
Hamstring part: extends hip joint
PA: Adductor Magnus
Adductor: inferior pubic ramus and ramus of ischium
Hamstring: ischial tuberosity
DA: Adductor Magnus
Adductor part: gluteal tuberosity, linea aspera, and medial supracondylar line
Hamstring part: adductor tubercle of femur
N: Adductor Magnus
Adductor: obturator nerve (L2, L3, L4)
Hamstring part: tibial nerve (L4)
MA: Gracilis
Adducts hip joint
Flexes knee joint
Medially rotates flexed knee
PA: Gracilis
Body and inferior ramus of pubis
DA: Gracilis
pes anserinus of tibia
N: Gracilis
Obturator nerve (L2, L3)
MA: Obturator Externus
Laterally rotates hip joint
stabilizes hip joint
PA: Obturator Externus
Margins of obturator foramen and obturator membrane
DA: Obturator Externus
Greater trochanter
N: Obturator Externus
Obturator nerve (L3, L4)
MA: Rectus Femoris
Extends knee joint
steadies hip joint
helps iliopsoas flex hip joint.
PA: Rectus Femoris
AIIS
Ilium
DA: Rectus Femoris
quadriceps tendon to tibial tuberosity via patellar ligament
N: Rectus Femoris
Femoral n. (L2-L4)
MA: Vastus Lateralis
Extends knee
PA: Vastus Lateralis
Greater trochanter
lateral lip of linea aspera
DA: Vastus Lateralis
quadriceps tendon to tibial tuberosity via patellar ligament
medial and lateral also attach to tibia and patella via aponeuroses (medial and lateral patellar retinacula).
N: Vastus Lateralis
Femoral n. (L2-L4)
MA: Vastus Medialis
Extends knee
PA: Vastus medialis
Intertrochanteric line
medial lip of linea aspera of femur
DA: Vastus medialis
quadriceps tendon to tibial tuberosity via patellar ligament
medial and lateral also attach to tibia and patella via aponeuroses (medial and lateral patellar retinacula).
N: Vastus medialis
Femoral n. (L2-L4)
MA: Vastus intermedius
Extends knee
PA: Vastus intermedius
Anterior and lateral femoral shaft
DA: Vastus intermedius
quadriceps tendon to tibial tuberosity via patellar ligament
N: Vastus intermedius
Femoral n. (L2-4)
MA: Semitendinosus
Extend hip joint
Flex knee joint and medially rotate it when flexed.
When hip and knee joints are flexed (as when sitting), these muscles can extend trunk at hip joint (to rise).
PA: Semitendinous
Ischial Tuberosity
DA: Semitendinosus
pes anserinus of tibia
N: Semitendinosus
Tibial nerve (L5, S1, S2)
MA: Semimembranosus
Extend hip joint
Flex knee joint and medially rotate it when flexed.
When hip and knee joints are flexed (as when sitting), these muscles can extend trunk at hip joint (to rise).
PA: Semimembranosus
Ischial Tuberosity
DA: Semimembranosus
Posterior part of medial condyle of tibia
Reflected attachment forms oblique popliteal ligament (to lateral femoral condyle)
N: Semimembranosus
Tibial n (L5, S1, S2)
MA: Biceps Femoris
Flexes knee joint and laterally rotates it when flexed;
Long head extends hip
PA: Biceps Femoris
Long head: ischial tuberosity
Short head: linea aspera and lateral supracondylar line of femur
DA: Biceps Femoris
Lateral side of head of fibula
N: Biceps Femoris
Long head: tibial nerve (L5, S1, S2)
Short head: common fibular division of sciatic nerve (L5, S1, S2)
MA: popliteus
Unlocks knee by rotating femur 5 degrees on fixed tibia
Medially rotate tibia if unplanted limb
PA: popliteus
Lateral condyle of femur
lateral meniscus
DA: popliteus
Posterior tibia above soleal line
N: popliteus
Tibial n. (L4, L5, S1)
MA: Gastrocnemius
Plantar flexes ankle when knee is extended
Raises heel during walking
Knee flexion
PA: Gastrocnemius
Medial head: popliteal surface of femur
Lateral head: lateral femoral condyle
DA: Gastrocnemius
Calcaneus via calcaneal tendon
N: Gastrocnemius
Tibial n. (S1, S2)
MA: Soleus
Plantarflex ankle (independent of knee position)
Stabilize ankle joint
PA: Soleus
Posterior fibular
Soleal line and medial tibia
Tendinous arch extending between bony attachments
DA: Soleus
Calcaneus via calcaneal tendon
N: Soleus
Tibial n. (S1, S2)
MA: Plantaris
Weakly assists gastrocnemius in plantar flex
PA: Plantaris
lateral supracondylar line of femur
oblique popliteal ligament
DA: Plantaris
Calcaneus via calcaneal tendon
N: Plantaris
Tibial n. (S1,S2)
MA: Flexor Hallucis Longus
Flex great toe at all joints
Weakly plantarflex ankle joint
Support medial longitudinal arch of foot
PA: Flexor Hallucis Longus
Lower posterior surface of fibula
interosseous membrane
DA: Flexor Hallucis Longus
Base of distal phalanx of great toe
N: Flexor Hallucis Longus
Tibial n. (S2, S3)
MA: Flexor Digitorum Longus
Flex lateral 4 digits
Plantarflex ankle
Support longitudinal arches of foot
PA: Flexor Digitorum Longus
Posterior tibia inferior to soleal line
By a broad tendon to fibula
DA: Flexor Digitorum Longus
Bases of distal phalanges of lateral 4 digits
N: Flexor Digitorum Longus
Tibial n. (S2, S3)
MA: Tibialis Posterior
Plantarflex ankle
Invert foot
Maintain medial longitudinal arch
PA: Tibialis Posterior
Interosseous membrane
Posterior tibia inferior to soleal line
Posterior surface of fibula
note: attaches to ALL 3 structures of the lower leg
DA: Tibialis Posterior
Tuberosity of navicular
cuneiforms
cuboid
sustentaculum tali of calcaneus
Bases of 2,3,4 metatarsals
N: Tibialis Posterior
Tibial n. (L4, L5)
MA: Fibularis Brevis
Everts subtalar joint
Weakly plantarflex ankle
PA: Fibularis Brevis
Inferior lateral fibula
DA: Fibularis Brevis
Lateral side of base of 5th metatarsal
N: Fibularis Brevis
Superficial fibular n. (L5, S1, S2)
MA: Fibularis Longus
Everts subtalar joint
Weakly plantar flex ankle
PA: Fibularis Longus
Head and superior lateral fibula
DA: Fibularis Longus
Base of 1st metatarsal
Medial cuneiform
N: Fibularis Longus
Superficial fibular n. (L5, S1, S2)
MA: Tibialis Anterior
Dorsiflex ankle
Invert subtalar joint
PA: Tibialis Anterior
Lateral condyle
superior 1/2 of tibia
interosseous membrane
DA: Tibialis Anterior
Medial cuneiform and base of 1st metatarsal
N: Tibialis Anterior
Deep Fibular n. (L4, L5)
MA: Extensor Hallucis Longus
Extends great toe
Dorsiflex ankle
PA: Extensor Hallucis Longus
Middle anterior fibula
Interosseous membrane
DA: Extensor Hallucis Longus
Base of distal phalanx of great toe
N: Extensor Hallucis Longus
Deep fibular nerve (L5, S1)
MA: Extensor Digitorum Longus
Extends lateral 4 digits
Dorsiflexes ankle joint
PA: Extensor Digitorum Longus
Lateral condyle of tibia
Superior surface of fibula
Interosseous membrane
note: attached to ALL 3 structures of the lower leg
DA: Extensor Digitorum Longus
Middle and distal phalanges of lateral four digits
N: Extensor Digitorum Longus
Deep fibular n. (L5, S1)
MA: Fibularis Tertius
DF ankle
Aids in eversion of STJ joint
PA: Fibularis Tertius
Inferior anterior surface of fibula
Interosseous membrane
DA: Fibularis Tertius
Dorsum of base of 5th metatarsal
N: Tibularis Tertius
Deep Fibular n. (L5, S1)
MA: Flexor Digitorum Brevis
Flex lateral 4 digits at MTP and IP joints
PA: Flexor Digitorum Brevis
Medial tubercle of tuberosity of calcaneus
Plantar aponeurosis
Intermuscular septa
DA: Flexor Digitorum Brevis
Both sides of middle phalanges of lateral 4 digits
N: Flexor Digitorum Brevis
Medial plantar n. (L5, S1)
MA: Quadratus Plante
Assists FDL in flexing lateral 4 digits at MTP and IP joints
PA: Quadratus Plante
Medial calcaneus
DA: Quadratus Plante
FDL tendon
N: Quadratus Plante
Lateral plantar n. (S1-S3)
MA: Lumbrical Muscles (Foot)
Of the lateral 4 digits…
Flex MTP joint
Extend PIP and DIP joints
PA: Lumbrical Muscles (Foot)
Tendons of FDL
DA: Lumbrical Muscles (Foot)
Medial aspect of extensor expansions over lateral 4 digits
N: Lumbrical Muscles (Foot)
Medial one: medial plantar nerve (L5–S1)
Lateral three: lateral plantar nerve (S1–S3)
MA: Adductor Hallucis
Adduct 1st digit
Assists maintaining transverse arch by pulling metatarsals medially
PA: Adductor Hallucis
Oblique head: bases of metatarsals 2–4
Transverse head: plantar ligaments of MTP joints
DA: Adductor Hallucis
lateral side of base of proximal phalanx of 1st digit.
N: Adductor Hallucis
lateral plantar nerve (S1–S3)
MA: Flexor Hallucis Brevis
Flex MTP joint of 1st digit
PA: Flexor Hallucis Brevis
Plantar surface of cuboid and lateral cuneiforms
DA: Flexor Hallucis Brevis
Both sides of base of proximal phalanx of 1st digit
Note: 2 sesamoid bones of the great toe are contained within its tendons
N: Flexor Hallucis Brevis
Medial plantar n. (L5, S1)
MA: Plantar Interossei (1-3)
Adduct digits 3-5 at MTP
PA: Plantar Interossei (1-3)
Plantar medial sides of shafts of metatarsals 3-5
DA: Plantar Interossei (1-3)
Medial phalanges of 3-5 digit
N: Plantar Interossei (1-3)
Lateral plantar n. (S1-S3)
MA: Dorsal Interossei
Abduct digits 2-4 at MTP
PA: Dorsal Interossei
Adjacent sides of shafts of metatarsals 1-5
DA: Dorsal Interossei
1st: medial side of proximal phalanx of 2nd digit
2nd–4th: lateral sides of 2nd–4th digits
N: Dorsal Interossei
Lateral plantar n. (S1-S3)
MA: Psoas Major
With origin fixed:
- hip flexion
- hip lateral rotation
With insertion fixed:
- trunk flexion towards thigh
- pelvic anterior tilt
Stabilize hip joint when standing
PA: Psoas Major
Sides of T12-L5 vertebrae and discs between them
TP of L1-L5
DA: Psoas major
Lesser trochanter
N: Psoas Major
Anterior rami of L1, L2, L3
MA: Iliacus
With origin fixed:
- hip flexion
- hip lateral rotation
With insertion fixed:
- trunk flexion towards thigh
- pelvic anterior tilt
PA: Iliacus
Iliac fossa
Sacrum
Anterior Sacroiliac ligaments
DA: Iliacus
Lesser trochanter
Psoas tendon
N: Iliacus
Femoral nerve (L2-L4)