Case 2 - Dermatomes Flashcards
what are dermatomes derived from
cells of a somite
what 3 regions do these cells differentiate into
- myotome
- dermatome
- sclerotome
what do myotomes form
some of the skeletal muscle
what do dermatomes form
the connective tissues including the dermis
what do sclerotomes form
give rise to the vertebrae
what do these areas of skin do
send signals to the brain through spinal nerves. these signals give rise to sensations involving temperature, pressure and pain
how many pairs of spinal nerves are there
31 pains
how many of these pairs have corresponding dermatomes
30
what is the exception?
C1 spinal nerve, which does not have a corresponding dermatome
what are the 5 classifications of spinal nerves
- cervical nerve
- thoracic nerves
- lumber nerves
- sacral nerves
- coccygeal nerve pair
where do cervical nerves exit
the neck region and are labeled C1-C8
where do thoracic nerves exit
the torso region and are labeled T1-T12
where do thoracic nerves exit
the torso region and are labeled T1-T12
where do lumbar nerves exit
the lower back region and are labelled L1-L5
where do the sacral nerves exit
the base of the spine and are labelled S1-S5
