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Motor Exam (Myotomes)
- C3-C5: Diaphragm
- C5: Shoulder Abduction
- C5-C6: Elbow Flexion
- C6-C7: Wrist Extension
- C7-C8: Elbow Extension
- C8: Finger Flexion
- T1-T6: Intercostal Muscles
- L3-L4: Thigh Adduction
- L2-L4: Knee Extension
- L4-L5: Ankle Dorsiflexion
- L5-S1: Great Toe Extension
- S1-S2: Ankle Plantarflexion
- S2-S4: Anal Sphincter Contraction
Dermatomes and cutaneous nerves - anterior
Dermatomes and cutaneous nerves - posterior
Lower limb peripheral innervation
Reflexes
Level
|
Reflex
|
C5
|
biceps
|
C6
|
brachioradialis
|
| C7
|
triceps
|
| L3
|
quadriceps
|
| S1
|
achilles tendon
|
| S2,3,4
|
bulbocavernosus, anal wink
|
Sensory Exam
- C2 Occiput
- C3 Thyroid Cartilage
- C4 Suprasternal Notch
- C5 Below Clavicle
- C6 Thumb
- C7 Index Finger
- C8 Little Finger
- T4 Nipple Line
- T10 Umbilicus
- L1 Femoral Pulse
- L2-L3 Medial Aspect of Thigh
- L4 Knee
- L5 Lateral Aspect of Calf
- S1 Lateral Aspect of Foot
- S2-S4 Perineal Region
Spinal Reflex Exam
- C6 Biceps
- C7 Triceps
- L4 Patellar
- S1 Achilles
See Also
Source
- Netter's Atlas
- Rosen's 2013, Chapter 43- Spinal Injuries- Tables 43-3,43-4
