Section 2: Back and Spinal Cord

Question 1

The muscles of the back can be divided into 2 major groups:

Answer 1

superficial or extrinsic back muscles, and the deep or intrinsic back muscles

[From KenHub video “Superficial muscles of the back”]

Question 2

Functionally, the superficial back muscles belong to the _____ _____, but are situated on the posterior aspect of the trunk.

Answer 2

upper limbs

[From KenHub video “Superficial muscles of the back”]

Question 3

Why are the superficial back muscles sometimes referred to as “immigrant muscles”?

Answer 3

these muscles migrate from the embryological upper limb during development

[From KenHub video “Superficial muscles of the back”]

Question 4

The deep or intrinsic back muscles act specifically on the _________ ______. These are known as the true back muscles.

Answer 4

vertebral column

[From KenHub video “Superficial muscles of the back”]