Muscle Exam 2

Question 1

Biceps Brachii

Answer 1

Origin- Long Head: Supraglenoid tubcercle; Short Head: Coracoid process
Insertion- Radial tuberosity
Action- Flexes and supinates forearm

Question 2

Triceps brachii

Answer 2

Origin- Long head: Infraglenoid tubercle; Lateral head: Proximal humerus; Medial head: Posterior humerus
Insertion- Olecranon process
Action- Extends forearm

Question 3

Brachioradialis

Answer 3

Origin- Distal humerus
Insertion- Styloid process of radius
Action- Flexes forearm

Question 4

Brachialis

Answer 4

Origin- Distal anterior humerus
Insertion- Coronoid process of ulna
Action- Flexes forearm

Question 5

Flexor carpal radialis

Answer 5

Origin- Medial epicondyle of humerus
Insertion- Second and third metacarpals
Action- Flexes and abducts hand

Question 6

Flexor carpal ulnaris

Answer 6

Origin- Medial epicondyle of humerus
Insertion- Medial carpals; fifth metacarpal
Action- Flexes and abducts hand

Question 7

Extensor carpal radialis longus

Answer 7

Origin- Lateral distal humerus
Insertion- Second metacarpal
Action- Extends and abducts hand

Question 8

Extensor carpal ulnaris

Answer 8

Origin- Lateral epicondyle of humerus
Insertion- Fifth metacarpal
Action- Extends and adducts hand

Question 9

Psoas major

Answer 9

Origin- Transverse processes and bodies of lumbar vertebrae
Insertion- Lesser trochanter
Action- Flexes thigh

Question 10

Iliacus

Answer 10

Origin- iliac fossa
Insertion- Lesser trochanter
Action- Flexes thigh

Question 11

Sartorius

Answer 11

Origin- Anterior superior iliac spine
Insertion- Medial condyle of the tibia
Action- Flexes, abducts and laterally rotates thigh; flexes leg

Question 12

Tensor fasciae latae

Answer 12

Origin- Iliac crest and anterior superior iliac spine
Insertion- Iliotibial tract
Action Flexes, abducts and medially rotates thigh

Question 13

Gracilis

Answer 13

Origin- Body and inferior ramus of pubis
Insertion- Medial surface of proximal tibia
Action- Adducts thigh; flexes leg

Question 14

Rectus femoris

Answer 14

Origin- Anterior inferior iliac spine
Insertion- Tibial tuberosity via patellar ligament
Action- Flexes thigh; extends leg

Question 15

Vastus lateralis

Answer 15

Origin- Greater trochanter, proximal lines aspera
Insertion- Tibial tuberosity via patellar ligament
Action- Extends leg

Question 16

Vastus medialis

Answer 16

Origin- Linea aspera and medial femur
Insertion- Tibial tuberosity via patellar ligament
Action- Extends leg

Question 17

Vastus intermedius (deep to rectus femoris)

Answer 17

Origin- Anterior and lateral proximal femur
Insertion- Tibial tuberosity via patellar ligament
Action- Extends leg

Question 18

Gluteus maximus

Answer 18

Origin- Posterior ilium, sacrum, and coccyx
Insertion- Gluteal tuberosity
Action- Extends, abducts and laterally rotates thigh

Question 19

Gluteus medius

Answer 19

Origin- Posterior surface ilium
Insertion- Greater trochanter
Action- Abducts and medially rotates thigh

Question 20

Biceps femoris

Answer 20

Origin- Long head: ischial tuberosity; Short head- posterior femur
Insertion- Head of fibula; lateral condyle of tibia
Action- Extends thigh; flexes leg

Question 21

Semitendinous

Answer 21

Origin- Ischial tuberosity
Insertion- Proximal medial tibia
Action- Extends thigh; flexes leg

Question 22

Semimembranosus

Answer 22

Origin- Ischial tuberosity
Insertion- Posterior medial condyle of tibia
Action- Extends thigh; flexes leg

Question 23

Tibialis anterior

Answer 23

Origin- Lateral condyle and proximal tibia
Insertion- Medial tarsal and first metatarsal
Action- Dorsiflexes and inverts foot

Question 24

Fibularis (peroneus) longus

Answer 24

Origin- Proximal lateral fibula
Insertion- Medial tarsal and first metatarsal
Action- Plantar flexes and everts foot

Question 25

Gastrocnemius

Answer 25

Origin- Femoral condyles
Insertion- Calcaneous
Action- Flexes leg and plantar flexes foot

Question 26

Soleus

Answer 26

Origin- Head of fibula, proximal tibia
Insertion- Calcaneous
Action- Plantar flexes foot