Major Muscle Groups

Question 1

What are the flexors of the arm?

Answer 1

Anterior.
Biceps, brachialis, coracobrachialis.
Innervated by musculocutaneous nerve.

Question 2

What are the extensors of the arm?

Answer 2

Posterior.
Triceps.
Innervated by radial nerve.

Question 3

What are the three compartments of the forearm?

Answer 3

Flexors - anterior, innervated by median and ulnar nerves.
Brachioradialis - posterior, innervated by musculocutaneous nerve.
Extensors - posterior, innervated by radial nerve.

Question 4

What are the three components of the glutes?

Answer 4

G. Maximus - extension, innervated by inferior gluteal nerve.
G. Medius - abduction, innervated by superior gluteal nerve.
G. Minimus - abduction, innervated by superior gluteal nerve.

Question 5

What are the three components of the thigh?

Answer 5

Hamstrings - sciatic nerve.
Quadriceps - femoral nerve.
Adductors - obturator nerve.

Question 6

What are the three compartments of the leg?

Answer 6

Dorsiflexors (anterior).
Plantarflexors (posterior).
Evertors (lateral).

Question 7

What are the actions of the hand and foot?

Answer 7

Hand - precision.
Foot - supports walking, maintains arches of the foot.

Question 8

Define agonist and antagonist.

Answer 8

Agonist - contracts, the prime mover.
Antagonist - relaxes.

Question 9

Define stabiliser and synergist.

Answer 9

Stabiliser - fixes the joint in place.
Synergist - augments agonist action.

Question 10

Why are flexors in the leg posterior?

Answer 10

The lower limbs rotate in the womb.