D25 - Plexus brachialis down to the elbow joint

Question 1

Location of plexus brachialis

Answer 1

• Cranial to 1^st rib
• Between the long muscles of the neck and m. scalenius

Question 2

Which spinal nerves is the brachial plexus formed by?

Answer 2

• Ventral branches of:
  
  • C6
  • C7
  • C8
  • T1
  • T2

Question 3

Give the branches of the first group of nerves

Answer 3

• The first group of nerves have very restricted global distributions are of no clinical importance

Question 4

Give the branches of the second group of nerves

Answer 4

Question 5

Give the branches of the third group of nerves

Answer 5

• The last group hold nerves which extend all the way from the brachial plexus to the apex of the limb

Question 6

Give the innervation of the joints of the forelimb

Answer 6

• Shoulder joint:
  
  • N. axillaris
  • N. suprascapularis
• Elbow joint & carpal joint:
  
  • ​N. mediana
  • N. ulnaris
• Fetlock joint & further digital joints:
  
  • ​Palmar nerves
  • Digital nerves