More Muscles

Question 1

Posterior of forearm- superficial

Answer 1

Brachioradialis
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor digitorum
Extensor digiti minimi
Extensor carpi ulnaris
Action: extend wrist and fingers
Innervation: radial nerve

Question 2

Posterior of forearm- deep

Answer 2

Supinator
Extensor indicis
Abductor pollicis longus
Extensor pollicis brevis
Extensor pollicis longus
Action: extend wrist and fingers
Innervation: radial nerve

Question 3

Abductor Pollicis longus
Extensor pollicis brevis
Extensor pollicis longus
Radial artery innervates and FOOSH injury results in scaphoid fracture tenderness

Answer 3

Anatomical snuffbox

Question 4

Repetitive use of superficial extensor muscles of forearm
Pain over lateral epicondyle where superficial wrist extensors originate from

Answer 4

Lateral epicondylitis

Question 5

Anterior compartment of forearm- superficial

Answer 5

Pronator Teres
Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris

Question 6

Origin: medial epicondyle of humerus
Insertion: mid shaft of radius
Action: pronates forearm
Innervation: median nerve

Answer 6

Pronator teres

Question 7

Origin: medial epicondyle of humerus
Insertion: base of 2nd metacarpal
Action: flexes wrist, abducts wrist
Innervation: median nerve

Answer 7

Flexor carpi radialis

Question 8

Origin: medial epicondyle of humerus
Insertion: palmar aponeurosis
Action: weak flexor of wrist
Innervation: median nerve

Answer 8

Palmaris longus

Question 9

Origin: medial epicondyle of humerus
Insertion:pisiform hook of hamate
Action: flexes wrist, Adducts wrist
Innervation: ulnar nerve

Answer 9

Flexor carpi ulnaris

Question 10

Anterior compartment of forearm- intermediate
Origin: medial epicondyle of humerus
Insertion: middle phalanges of 2-5
Action: flexes wrist, flexes middle phalanges 2-5
Innervation: median nerve

Answer 10

Flexor digitorum superficialis

Question 11

Anterior compartment of forearm- deep

Answer 11

Flexor digitorum profundus
Flexor pollicis longus
Pronator quadratus

Question 12

Origin: proximal ulna
Insertion: distal phalanges 2-5
Action: flexes wrist, flexes middle phalanges 2-5 & joints
Innervation: median nerve (lateral 1/2), ulnar nerve (medial 1/2)

Answer 12

Flexor digitorum profundus

Question 13

Origin: distal radius
Insertion: distal phalanx thumb
Action: flexes thumb
Innervation: median nerve

Answer 13

Flexor pollicis longus

Question 14

Origin: distal ulna
Insertion: distal radius
Action: pronates forearm
Innervation: median nerve

Answer 14

Pronator quadratus

Question 15

Anterior compartment of thigh

Answer 15

Quads- rectus femoris, vastus lateralis, vastus medialis, vastus intermedius
Action: extend leg
Innervation: femoral nerve

Question 16

Medial compartment of thigh

Answer 16

Adductor longus
Adductor brevis
Adductor magnus
Gracialis
Pectineus

Action: adduct thigh
Innervation: obturator nerve

Question 17

Anterior compartment of leg

Answer 17

Tibialis anterior
Extensor digitorum longus
Extensor hallicis longus
Fibularis tertius

Action: dorsiflexes foot, extend toes
Innervation: deep fibular nerve

Question 18

Posterior compartment of leg

Answer 18

Superficial- gastrocnemius, soleus, plantaris
Deep- popliteus, tibialis posterior, flexor digitorum longus, flexor hallucis longus

Action: planter flexes foot, inverts foot, flexes toes
Innervation: tibial nerve

Question 19

Lateral compartment of leg

Answer 19

Fibularis longus
Fibularis brevis

Action: plantar flexes foot, everts foot
Innervation: superficial fibular nerve

Question 20

Increased pressure within a muscle compartment leading to insufficient blood supply tissue ischemia (muscle dies)
Acute- traumatic injury
Chronic- repetitive muscle use anterior of leg
Pain
Parenthesia
Pallor
Pulselessness swelling
Paralysis

Answer 20

Compartment syndrome

Question 21

Muscle fibers pull in different directions, origin of muscle is broad, fascicles convert toward tendon of insertion

Answer 21

Convergent pattern

Question 22

Many fascicles attached side by side inserting into one tendon

Answer 22

Mulitpennate

Question 23

Fascicles insert into tendon form both sides

Answer 23

Bipennate

Question 24

Fascicles insert into one side of tendon

Answer 24

Unipennate