Grip Types

Question 1

What are the 2 types of classifications of grip

Answer 1

Precision and power

Question 2

What briefly is precision grip

Answer 2

When the object is small and/ or fragile

It is gripped between the pads of the digits which conform to its shape

Question 3

What muscles are involved in precision grip

Answer 3

Small muscles of the hand

Flexors digitorum profundus and superficialis and pollicis longus

Question 4

Some types of precision grip

Answer 4

Terminal opposition (pincer)
Subterminal opposition
Subtermino-lateral opposition

Question 5

Describe terminal opposition grip

Answer 5

Finest and most precise of all grips

Pads of digits or even nails used to pick uo up fine objects such as a pin

Question 6

Describe subterminal opposition grip

Answer 6

Palmar surfaces of the thumb, index finger and possibly other fingers come into contact with eachother
Most common example is tripod grip
Another example is pinch grip as in holding a clothes peg (palmar surafces compared to pincer grip)

Question 7

Describe subterminolateral opposition grip

Answer 7

The pad of the thumb presses against the side of the index finger
e.g. to hold a key
Is less fine but strong

Question 8

Briefly what is power grip

Answer 8

Where considerable force may be required
The hand is used in addition to the fingers
The wrist flexors and extensors work strongly to fix the hands position while the long flexors and intrinsic hand muscles work to grip the object

Question 9

Types of power grip

Answer 9

Oblique palmar
Ball grip
Cylinder
Hook

Question 10

Describe oblique palmar grip

Answer 10

The most powerful grip
Whole hand and fingers wrap around the object whose long axis lies obliquely across the palm
Thumb acts as a buttress
e.g. using a screwdriver

Question 11

Describe the ball grip

Answer 11

Ball shaped object is enclosed by fingers thumb and palm
Fingers and thumb are increasingly abducted as diameter increases
If the object is flat as with a jar lid the palm may not make contact - span grip

Question 12

Describe the cylinder grip

Answer 12

Object is held transversely across the palm fingers and thumb

Question 13

Describe the hook grip

Answer 13

Object (such as suit case handle) is held across the palmar surface of the flexed fingers
Thumb plays no part, only secure in one direction, towards the fingers
Should the weight increase grip will change to palmar grip

Question 14

What factors determine grip strength

Answer 14

Size of the object, weight of the object, shape of the object, functioning of muscles