Kinesiology Exam #3 (EMA)

How many joints does the thumb have?

3

Name the thumb joints?

CMC, MCP, IP

The hand is the ____ end of the upper extremity

distal

What is the purpose of the UE hand?

to position our hands in various positions to accomplish tasks

How many digits do we have?

5

How many fingers do we have?

4

Which digit is the first digit?

thumb

What kind of joint is the thumb?

saddle joint (both surfaces are concave and convex)

What joints does most of the thumbs movement come from?

CMC

MCP and interphalangeal do which finger movements?

flexion and extension

What is a unique property of the thumb?

provides more stability and mobility

Arthrokinematic motions during metacarpophalangeal (MCP) abduction of digits 2 to 5 of roll and glide occur in the same direction because the

concave phalange moves on the convex metacarpal

What type of joints is the interphalangeal (IP)?

uniaxial hinge joint

What type of joint is the wrist?

condyloid joint

How many joints does each finger have?

4

The carpometacarpal (CMC) joint of the thumb does what movements?

flexion/extension, abduction/adduction, opposition/reposition

circumduction movement comes from ____

MCP

How many carpals do we have?

8

How many phalanges are there?

14

How many metacarpals do we have?

5

How many phalanges does the thumb have?

2

How many phalanges do the fingers have?

3

What are the two ligaments that hold tendons close to the wrist preventing bow-stringing when the wrist flexes?

palmar carpal ligament, transverse carpal ligament

What is the purpose of the flexor retinaculum?

hold tendons close to the wrist preventing bow-stringing when the wrist flexes

Surgery associated with the carpal tunnel?

release surgery

What are the components of the carpal tunnel?

4 digitorum superficials, 4 digitorum profundus, median nerve, flexor pollicis longus

What is the purpose of the extensor retinaculum?

fibrous band traversing the posterior side of the wrist and holds the extensor tendons close to the wrist

What is the purpose of the extensor expansion ligament and extensor hood?

covers the MCP

What are the 3 arch complex of palmar arches?

proximal carpal arch, distal carpal arch, longitudinal arch

What is the purpose of the arches in the hand?

helps perform various grasps

What is aponeurosis?

a thin sheath of connective tissue that helps connect your muscles to your bones

extrinsic muscles

gross muscles (they do a lot)

Which is the only common extensor muscles of the fingers that extends MCP, PIP, and DIP joints of the 4 fingers, and helps perform wrist extension?

extensor digitorum

What is the 2nd digit?

pointer finger

What is the 3rd digit?

middle finger

What is the 4th digit?

ring finger

What is the 5th digit?

pinky finger

What is the thumb cmc joint made up of?

the trapezium bone articulates with the base of the 1st metacarpal

The metacarpophalangeal (MCP) is also known as the ____

knuckles

metcarpals have a ____ and a ____

base, head

What are the three anterior extrinsic muscles of the hand?

flexor digitorum superficialis, flexor digitorum profundus, flexor pollicis longus

flexor digitorum superficialis flexes the ____ and ____

MCP, PIP

Flexor digitorum profundus flexes the ____, ____, and ____

MCP, PIP, DIP

Flexor pollicis longus flexes ____, ____, and ____ of the thumb

CMC, MCP, IP

What are the 6 posterior extrinsic muscles of the hand?

adbuctor pollicis longus, extensor pollicis brevis, extensor pollicis longus, extensor digitorum, extensor indicis, extensor digiti minimi