7.2 Posterior trunk

Question 1

3 groups of muscles of the back ?

Answer 1

• superficial
• intermediate
• deep

Question 2

Superficial and intermediate groups
1. muscle extrinsic / intrinsic
2. muscles originate from where ?
3. innervated by ?

Answer 2

1. extrinsic
2. location other than the back
3. anterior rami of spinal nerves

Question 3

deep groups
1. muscle extrinsic / intrinsic
2. muscles develop from where ?
3. innervated by ?
4. movements related to ?

Answer 3

1. intrinsic
   2.within the back
   3.posterior rami of spinal nerves
   4.movements of vertebral column and head

Question 4

What’s epimere innervated by ?

Answer 4

dorsal branch of spinal nerve for that segment (posterior primary rami)

Question 5

what’s hypomere innervated by ?

Answer 5

ventral branch (anterior primary rami)