T11 spinal nerve

Nervus spinalis T11

NervousNervesThoraxLeft and right

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What it is
The T11 spinal nerve leaves the spinal canal between T11 and T12. Its sensory (dorsal) and motor (ventral) roots meet just beyond the dorsal root ganglion; the short mixed nerve then splits into a small dorsal ramus for the back muscles and skin and a larger ventral ramus, which becomes the 11th intercostal nerve.
Function
Carries motor fibres to the muscles of its segment (myotome) and sensation back from its strip of skin (dermatome): a band of skin across the lower abdomen.
Size
About 2-3 mm thick; the mixed nerve is only ~1 cm long before it divides
Clinical note
With T12 it supplies the lower abdominal muscles; weakness pulls the umbilicus upward when the patient lifts the head (Beevor sign).

Nearby nervous structures 6th intercostal nerve, 7th intercostal nerve, 8th intercostal nerve, T10 spinal nerve, T12 spinal nerve, T6 dorsal root ganglion, T6 spinal nerve, T7 spinal nerve, T8 spinal nerve, T9 spinal nerve