Dermatomes Flashcards
C2 dermatome
Back of head, ears, jaw
Muscles: Mastication
Function: Ingestion
C3 dermatome
Neck region
Muscles: sternocleidomastoid, upper trapezius
Function: Head control
C4 dermatome
Upper shoulders
Muscles: trapezius, diaphragm
Function: Head control
C5 dermatome
Clavicles
Muscles: Deltoid, Biceps, Rhomboids
Function: Elbow flexion
C6 dermatome
Thumb and radial side of arm
Muscles: ECR, biceps
Function: Shoulder abduction, wrist extension
C7 dermatome
Index and middle finger, posterior arm
Muscles: Triceps, extensors of wrist and fingers
Function: Wrist flexion, finger extension
C8 dermatome
Ring and little finger, ulnar side of arm
Muscles: Flexors of wrist and fingers
Function: Finger flexion
T1 dermatome
Axilla and proximal medial arm
Muscles: Hand intrinsics
Function: Abduction and adduction of fingers
T2-12 dermatome
Thorax
Muscles: intercostals
Function: Respiration
T4-6 dermatome
Nipple line
Muscles: intercostals
Function: Respiration
T11 dermatome
Midchest region, lower rib
Muscles: Abdominal wall, abdominal muscles
Function: T5-7 superficial abdominal reflex
T10 dermatome
Umbilicus
Muscles: Psoas, iliacus
Function: Leg flexion
L1-2 dermatome
Inside of thigh
Muscles: Cremasteric reflex, accessory muscles
Function: Elevation of scrotum
L2 dermatome
Proximal anterior thigh
Muscles: Iliopsoas, adductors of thigh
Function: reflex voiding
L3-4 dermatome
Anterior knee
Muscles: Quadriceps, tibialis anterior, detrusor urinae
Function: Hip flexion, knee extension, thigh abduction
