Muscles and Nerves Lecture

Question 1

What joints does the biceps brachii cross?

Answer 1

The biceps brachii crosses:

Shoulder joint

Elbow joint

Superior radio-ulnar joint

Question 2

Where does a skeletal muscle move towards during contraction?

Answer 2

During contraction a skeletal muscle always moves towards its point of origin

Question 3

What is Hilton’s Law?

Answer 3

Hilton’s Law states the nerve supplying the muscles extanding directly across and acting at a given joint also innervates the joint and the overlying skin

Question 4

What comparments are present in upper limbs?

Answer 4

Anterior and posterior compartments are present in upper limbs

Question 5

What compartments are present in the lower leg?

Answer 5

Anterior, posterior and lateral compartments are present in the lower leg

Question 6

What compartments are present in the thigh?

Answer 6

Anterior, posterior and medial compartments are present in the thigh

Question 7

What do ligaments do?

Answer 7

Ligaments stabalise joints by joining bone to bone

Question 8

What is the advantage of plexuses?

Answer 8

Skeletal muscles are controlled by different axons from different levels of the spinal cord, meaning if one area is damaged it doesn’t completely stop the innervation of the tissue

Question 9

Which rami forms plexuses?

Answer 9

Only the ventral rami forms plexuses, except tharacic ventral rami which do not form them