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Dermatomes

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Topic updated on 12/16/16 11:13am

Overview
  •  Definition
    • an area of skin that is mainly supplied by a single spinal nerve
  • Use
    • determining which part of the spine is affected by nerve damage
Head and Neck
 
Vertebral Level Sensory Area Way to Remember
C2 Occipital Protuberance  
C3 Supraclavicular fossa  
C4 Acromioclavicular joint  
V1 Ophthalmic division of Trigeminal nerve (upper face)  
V2 Maxillary division of Trigeminal nerve (middle face)  
V3 Mandibular division of Trigeminal nerve (lower face)  

                                                

Upper Extremity
 
Vertebral Level Sensory Area Way to Remember
C5 Lateral antecubital fossa  
 C6  Thumb "Six shooter"
C7 Middle finger  
C8 Little finger  
T1 Medial antecubital fossa  
T2 Apex of axilla  

                                  

                                

Chest and Abdomen
 
Vertebral Level Sensory Area Way to Remember
T4 Chest at level of nipple T4 at teat pore
T7

Chest at level of xiphoid process

T7 at bottom of sternum
T10 Abdomen at level of umbilicus T10 at belly button (butTEN)
L1 Abdomen at inguinal ligament L1 for IL

 

Lower Extremity
 
Vertebral Level Sensory Area Way to Remember
L1  Upper anterior thigh  
L2 Mid anterior thigh  
L3 Medial femoral condyle  
L4 LE at patella/medial malleolus L4 on "all fours"
L5 Dorsum 3rd MTP joint  
S1 Lateral heel  
S2 Popliteal fossa  
S3 Ischial tuberosity  
S5 Perianal area  

 



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