Exam Pearls: Cold sensation testing
1. Use syringe filled with Alcohol and blunt needle
2. Spray skin at each dermatome level
3. Patient should feel cold sensation
Upper body Sensory Innervation
1. C5: Deltoid, Lateral Upper Arm and Forearm
2. C6: Thumb (Radial Nerve)
3. C7: Middle Finger (Median Nerve)
4. C8: Ring
5. C8: Little Finger or pinky finger (Ulnar Nerve)
6. T4: Nipple
7. T8: Xiphoid
8. T10: Umbilicus
9. T12: Symphysis
Lower body Sensory Innervation
1. L4: Medial Low Leg and foot
2. L5: Space between 1st and second toes
3. S1: Lateral Foot
4. S3: Ischial tuberosity area
5. S4-5: Perianal region

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This page was written by Scott Moses, MD. This page was last revised before 5/10/08, prior to consistent tracking of revision date. This page was last published on 5/10/2008. Please send comments and questions to the editor. Contact information may be found on the page About the Family Practice Notebook. These pages are best viewed with Microsoft Internet Explorer 6.0.