nerves and arteries of arm

Question 1

brachial artery

Answer 1

• provides the main arterial supply to the arm and is the continuation of the axillary artery
• begins at the inferior border of the teres major and ends in the cubital fossa (under cover of the bicipital aponeurosis)
• then divides into the radial and ulnar arteries

Question 2

axillary nerve

Answer 2

supplies deltoid and terres minor

Question 3

radial nerve

Answer 3

• descends inferolaterally with the profounda brachii artery and curves around the humeral shaft in the radial groove
• supplies the muscles in the posterior compartments of the arm and forearm and the overlying skin

Question 3

profunda brachii artery

Answer 3

descends with radial nerve

Question 4

medial inter muscular septum
lateral inter muscular septum

Question 5

see lecture 13 for elbow joint and bones

Question 6

Concentric, Eccentric and Isometric

Answer 6

• *Concentric** : when muscles contract, upwards motion in a curl
• *Eccentric** : when muscles lengthen, downwards motion in a curl
• *Isometric** : no movement, muscle does not change length, good for maintaining muscle not necessary building

Question 7

Agonist, Antagonist and Synergist

Answer 7

An Agonist is the muscle that is contracting, the Antagonist Is the muscle that is able to relax/lengthen

Synergists are muscles that work together to create a movement :

ex: Illiacus, posts major and rectus femoris work together to flex the hip joint