Unit Two Muscles Of Hand

Question 1

Characteristics of primates

Answer 1

Loss of claws, replaced by nails, increased sensitivity of palmar digit pads, enlarged clavicle, enhanced mobility of shoulder joint, enhanced mobility of the individual digits, opposable 1st digit

Question 2

What is the motor humunculus

Answer 2

Pre central gyrus, primary motor cortex and large portion of brain devoted to hands

Question 3

The thenar eminence is made up of what muscles

Answer 3

Opponens pollicis, abductor pollicis brevis, flexor pollicis brevis

Question 4

What are the muscles of the hypothenar eminence

Answer 4

Abductor digiti minimi, flexor digiti minimi brevis, opponens digiti minimi

Question 5

What muscle is not normally found in humans, and it is rare anatomical variance

Answer 5

Flexor digiti minimi longus

Question 6

The central compartment is made up of

Answer 6

Abductor pollicis brevis, flexor pollicis brevis, oblique head of adductor pollicis, transverse head of adductor pollicis, flexor digiti minimi, abductor digiti minimi, superficial palmar arch, common palmar digital branches

Question 7

Lumbricals one and two uni or bipennate

Answer 7

Unipennate

Question 8

Lumbricals three and four uni or bipennate

Answer 8

Bipennate

Question 9

What is the only thenar muscle innervated completely by the ulnar nerve

Answer 9

Adductor pollicis

Question 10

What muscle fill the space between the metacarpal bones

Answer 10

Dorsal interosseous

Question 11

What muscles are easily monitored indicators of muscle waisting in the hand

Answer 11

Dorsal interosseous

Question 12

What muscle is lacking in the 1st and 5th digit bc they have their own abductors

Answer 12

Dorsal interosseous

Question 13

What muscle is the interosseous of the 1st metacarpal

Answer 13

Flexor pollicis brevis

Question 14

Aka of extensor expansion

Answer 14

Dorsal expansion or dorsal hood

Question 15

Describe extensor expansion

Answer 15

Connective attachments by which the extensor tendons insert into the phalanges

Question 16

The extensors expansions spans over what

Answer 16

Proximal and middle phalanges

Question 17

At the distal end of the metacarpal, the extensor tendon will expand to form

Answer 17

A hood

Question 18

The hood of the extensor tendon covers what

Answer 18

The back and sides of the head of the metacarpal and proximal phalanx

Question 19

What inserts on the extensor expansion

Answer 19

Lumbricals, extensor indicis, dorsal interossei and palmar interossei

Question 20

The muscles that insert on the extensor expansion serve to extend what

Answer 20

Interphalangeal joints (DIP and PIP)

Question 21

The interossei and lumbricals flex what

Answer 21

Metacarpal phalangeal joints