Dermatomes Flashcards
What is a dermatome?
A dermatome is defined as the area of skin supplied by a single nerve root.
The 31 spine segments on each side give rise to 31 spinal nerves, which are composed of how many spinal nerves per region?
8 cervical
12 thoracic
5 lumbar
5 sacral
1 coccygeal spinal nerve.
What transmits sensory information from a specific dermatome?
Sensory/afferent nerve fibers to the spinal
nerve of a specific segment of the spinal cord.
What occurs with pressure to a nerve root?
leads to loss of muscle [tone and mass], but the loss is often not as obvious as when pressure is applied to a peripheral nerve.
C1 Dermatome
Vertex of Skull
C2 Dermatome
Temples, Forehead, Occiput
C3 Dermatome
Entire Neck, Posterior Cheek, Temporal Area
C4 Dermatome
Shoulder area
Clavicular area
Upper Scapular Area
C5 Dermatome
Deltoid Area
Anterior Aspect of entire arm to base of to thumb
(School taught us lateral arm)
C6 Dermatome
Radial side of hand to thumb and index finger
C7 Dermatome
Long (middle) finger
Ring Finger
C8 Dermatome
Little Finger
T1 Dermatome
Medial side of forearm to base of little finger
T2 Dermatome
Medial side of upper arm to medial elbow
T4 Dermatome
Nipple Line
