Week 3 muscles

Question 1

Answer 1

Gluteus Maximus

O:

• Posterior ilium
• Sacrum
• Coccyx

I:

• Gluteal tuberosity of femur
• Iliotibial tract (band)

Inner: Inferior gluteal nerve

A: Extension of hip

Question 2

Answer 2

Gluteus Medius

O: External surface of ilium

I: Greater trochanter of femur

Inner: Superior gluteal nerve

A:

• Abduction
• Internal rotation

Question 3

Answer 3

Gluteus Minimus

O: External surface of ilium

I: Greater trochanter of femur

Inner: Superior gluteal nerve

A:

• Abduction
• Internal rotation

Question 4

Answer 4

Piriformis

O: Anterior sacrum

I: Greater trochanter of femur

Inner:

Nerve to piriformis

(ventral rami L5, S1, S2)

A: External rotation

Question 5

Answer 5

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

Question 6

Answer 6

Obturator Internus

O: Internal surface of obturator membrane

I: Greater trochanter of femur

Inner: Nerve to obturator internus

A: External rotation

Question 7

Answer 7

Superior Gemellus

O: Ischial spine

I: Greater trochanter of femur

Inner: Nerve to Obturator internus

A: External rotation

Question 8

Answer 8

Inferior gemellus

O: Ischial tuberosity

I: Greater trochanter of femur

Iner: Nerve to quadratus femoris

A: External rotation

Question 9

Answer 9

Quadratus femoris

O: Ischial tuberosity

I: Quadrate tubercle

Inner: Nerve to quadratus femoris

A: External rotation

Question 10

Answer 10

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

Question 11

Answer 11

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)

Question 12

Answer 12

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)

Question 13

Answer 13

Rectus Femoris

O: Anterior inferior iliac spine

I: Tibial tuberosity via patellar ligament

Inner: Femoral nerve

A: hip Flexion

Question 14

Answer 14

vastus lateralis

O: -Anterior and lateral shaft of the femur

I: Tibial tuberosity via patellar ligament

Inner: Femoral nerve

A: Extension

Question 15

Answer 15

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

Question 16

Answer 16

Vastus intermedius

O:

• Greater trochanter
• Lateral lip of linea aspera of femur

I: Tibial tuberosity via patellar ligament

Inner: Femoral nerve

A: Extension

Question 17

Answer 17

Sartorius
O: Anterior superior iliac spine

I: Medial surface of superior part of tibia (pes anserinus)

Inner: Femoral nerve

A: Flexion knee

Question 18

Answer 18

iliacus

O:

• Iliac fossa
• Iliac crest
• Base of sacrum

I:

• Lesser trochanter of femur
• Tendon of psoas major

Inner: Femoral nerve

A: Flexion

Question 19

Answer 19

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

Question 20

Answer 20

Adductor Longus

O: Body of pubis inferior to pubic crest

I: Linea aspera of femur

Inner: Obturator nerve

A: -Adduction hip

Question 21

Answer 21

Adductor Brevis

O: Inferior ramus of pubis

I: Linea aspera of femur

Inner: Obturator nerve

A: -Adduction hip

Question 22

Answer 22

Gracilis

O: Inferior ramus of pubis

I: Medial surface of superior part of tibia (pes anserinus)

Inner: Obturator nerve

A: Adduction hip, Flexion knee

Question 23

Answer 23

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

Question 24

Answer 24

Pectineus

O: -Superior pubic ramus

I: Pectineal line of femur

Inner:

• Femoral nerve
• Obturator nerve

A:

• Adduction hip
• Flexion hip

Question 25

Answer 25

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.

Question 26

Answer 26

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.

Question 27

Answer 27

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.

Question 28

Answer 28

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.

Question 29

Answer 29

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

Question 30

Answer 30

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.

Question 31

Answer 31

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

Question 32

Answer 32

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.

Question 33

Answer 33

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.

Question 34

Answer 34

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.

Question 35

Answer 35

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.