Week 3 muscles Flashcards
Gluteus Maximus
O:
- Posterior ilium
- Sacrum
- Coccyx
I:
- Gluteal tuberosity of femur
- Iliotibial tract (band)
Inner: Inferior gluteal nerve
A: Extension of hip
Gluteus Medius
O: External surface of ilium
I: Greater trochanter of femur
Inner: Superior gluteal nerve
A:
- Abduction
- Internal rotation
Gluteus Minimus
O: External surface of ilium
I: Greater trochanter of femur
Inner: Superior gluteal nerve
A:
- Abduction
- Internal rotation
Piriformis
O: Anterior sacrum
I: Greater trochanter of femur
Inner:
Nerve to piriformis
(ventral rami L5, S1, S2)
A: External rotation
Tensor Fasciae Latae
O:
- Anterior superior iliac spine
- Anterior part of iliac crest
I:
-Illiotibial tract (band)
Inner: Superior gluteal nerve
A:
- Flexion
- Abduction
- Internal rotation
Obturator Internus
O: Internal surface of obturator membrane
I: Greater trochanter of femur
Inner: Nerve to obturator internus
A: External rotation
Superior Gemellus
O: Ischial spine
I: Greater trochanter of femur
Inner: Nerve to Obturator internus
A: External rotation
Inferior gemellus
O: Ischial tuberosity
I: Greater trochanter of femur
Iner: Nerve to quadratus femoris
A: External rotation
Quadratus femoris
O: Ischial tuberosity
I: Quadrate tubercle
Inner: Nerve to quadratus femoris
A: External rotation
Semitendinosus
O: Ischial tuberosity
I: Medial surface of superior part of tibia (pes anserinus)
Inner: Tibial portion of sciatic nerve
A: Extension hip, knee flexion
Semimembranosus
O: Ischial tuberosity
I: Medial condyle of tibia (posterior medial aspect)
Inner: Tibial portion of sciatic nerve
A: Extension hip, flexion of knee
-Medial rotation (when knee is flexed)
Biceps femoris
O:
Long head- ischial tuberosity
Short head- lateral lip of linea aspera and supracondylar line
I:
Head of fibula
Inner:
- Tibial portion of sciatic nerve (long head)
- Common fibular portion of sciatic nerve (short head)
A: Extension (long head) hip,
- Flexion knee
- Lateral rotation (when knees is flexed)
Rectus Femoris
O: Anterior inferior iliac spine
I: Tibial tuberosity via patellar ligament
Inner: Femoral nerve
A: hip Flexion
vastus lateralis
O: -Anterior and lateral shaft of the femur
I: Tibial tuberosity via patellar ligament
Inner: Femoral nerve
A: Extension
Vastus medialis
O:
Intertrochanteric line of femur
-Medial lip of linea aspera of femur
I: Tibial tuberosity via patellar ligament
Inner: Femoral nerve
A: Extension
Vastus intermedius
O:
- Greater trochanter
- Lateral lip of linea aspera of femur
I: Tibial tuberosity via patellar ligament
Inner: Femoral nerve
A: Extension
Sartorius
O: Anterior superior iliac spine
I: Medial surface of superior part of tibia (pes anserinus)
Inner: Femoral nerve
A: Flexion knee
iliacus
O:
- Iliac fossa
- Iliac crest
- Base of sacrum
I:
- Lesser trochanter of femur
- Tendon of psoas major
Inner: Femoral nerve
A: Flexion
Psoas Major
O: -Transverse processes of lumbar vertebrae (ventral surface)
I: Lesser trochanter of femur
Inner:
Nerve to psoas major
(ventral rami L1, L2, L3)
A: Flexion hip
Adductor Longus
O: Body of pubis inferior to pubic crest
I: Linea aspera of femur
Inner: Obturator nerve
A: -Adduction hip
Adductor Brevis
O: Inferior ramus of pubis
I: Linea aspera of femur
Inner: Obturator nerve
A: -Adduction hip
Gracilis
O: Inferior ramus of pubis
I: Medial surface of superior part of tibia (pes anserinus)
Inner: Obturator nerve
A: Adduction hip, Flexion knee
Adductor magnus
O:
- Inferior pubic ramus
- Ishcial ramus
- Ishchial tuberosity
I:
- Gluteal tuberosity of femur
- Linea aspera of femur
- Adductor tubercle of femur
Inner:
- Obturator nerve
- Tibial portion of sciatic nerve
A:
- Adduction hip
- Flexion hip
- Extension hip
Pectineus
O: -Superior pubic ramus
I: Pectineal line of femur
Inner:
- Femoral nerve
- Obturator nerve
A:
- Adduction hip
- Flexion hip
Gastrocenemius
O:
Medial head: medial condyle of femur and area just above condyle.
Lateral head: lateral condyle of femur and area just above condyle.
I:
Posterior calcaneus via calcaneal tendon.
Inner: Tibial nerve (S1, S2).
A:
- Plantar flexes foot.
- Flexes the leg at the knee.
Soleus
O:
Proximal half of posterior surface of tibia along soleal line.
proximal 1/3 of posterior fibula.
I: Posterior calcaneus via calcaneal tendon.
Inner: Tibial nerve (S1, S2).
A: Plantar flexes foot.
Plantaris
O: Inferior lateral supracondylar ridge of femur just above attachment of lateral head of gastrocnemius.
I: Posterior calcaneus (tuberosity) via calcaneal tendon.
Inner: Tibial nerve (L4, L5, S1)
A:
Plantar flexes foot.
Flexes the leg at the knee.
Tibialis Posterior
O:
a. Lateral portion of posterior, proximal tibia.
b. Interosseous membrane.
c. Medial portion of posterior, proximal half of fibula.
I: Navicular tuberosity, cuneiforms, cuboid, 2-4 metatarsals, and sustentaculum tali of calcaneus.
Inner: Tibial nerve (L5, S1).
A:
- Inverts foot.
- Plantar flexes foot.
Flexor digitorum longus
O: Medial half of middle posterior surface of tibia
I: Bases of distal phalanges II-V (along plantar surfaces).
Inner: Tibial nerve (L5, S1)
A:
- Flexes phalanges II-V.
- Plantar flexes foot
Flexor Hallucis Longus
O:
a. Distal 2/3 of posterior surface of fibula.
b. Adjacent interosseous membrane.
I: Base of distal 1st phalanx (along plantar surface).
Inner: Tibial nerve (L5, S1, S2).
A:
- Flexes phalanx.
- Plantar flexes foot.
Tibialis Anterior
O:
- Lateral condyle & superior 2/3 of anteriolateral surface of tibia;
- Interosseous margin.
I:
Medial & plantar surfaces of medial cuneiform.
Base of 1st metatarsal along the medial & plantar surfaces.
Inner: Deep peroneal nerve (L4, L5, S1
A:
- Dorsiflexes foot at ankle.
- Inverts foot at ankle
Extensor Digitorum Longus
O: Lateral condyle of tibia & superior 3/4 of anterior surface of fibula; interosseous margin.
I:
Middle & distal phalanges of digits 2-5.
Inner: Deep peroneal nerve (L4, L5, S1
Actions:
- Extends toes 2-5.
- Dorsiflexes foot at ankle.
Extensor Hallucis Longus
O:
Middle anterior surface of fibula.
interosseous margin.
I:
Distal phalanx #1 (big toe).
Inner: Deep peroneal nerve (L4, L5, S1)
A:
- Extends toes #1 (big toe).
- Dorsiflexes foot at ankle.
- Inverts foot at ankle.
Fibularis Longus
O: Head and proximal 1/2 to 2/3 of lateral side of fibula.
I: Crosses plantar surface of foot to attach to lateral sides of medial (1st) cuneiform and 1st metatarsal.
Inner: Superficial fibular (peroneal) nerve (L4, L5, S1).
A:
- Plantar flexes foot at ankle.
- Everts foot at ankle.
Fibularis Brevis
O: Distal 1/3 to 1/2 of lateral side of fibula.
I: Tuberosity on lateral side of 5th metatarsal.
Inner: Superficial fibular (peroneal) nerve (L4, L5, S1).
A:
- Plantar flexes foot at ankle.
- Everts foot at ankle.
