The exact etiology of NP still has not been fully elucidated, however, it is widely accepted that NP is a sensory neuropathy caused by alteration and damage to the cutaneous branches of the dorsal primary rami of thoracic spinal nerves
, most commonly T2 through T6.
Branches were as follows: Lateral branches in 9 (64.3%) cases, the GRC to 7th and 8th cervical and 1st thoracic spinal nerves
were seen (Fig.
Local anesthetic seems to spread along the dorsal rami of the thoracic spinal nerves
, which run through the costotransverse foramina of Cruveilhier.
The dorsal rami of the thoracic spinal nerves
T2 to T6 are considered to be responsible for these symptoms.
Notalgia paresthetica (NP) is a neuropathy with unknown cause of thoracic spinal nerves
T2-T6, particularly their dorsal branches.
The communicating branches (ramus communicantes) which has diverged from cervicothoracic ganglion and extended to ventral rami of cervical and thoracic spinal nerves
are one number in the literature (Getty, 1975; Kalsey et al., 2000; Pather et al., 2006; Ozgel et al., 2009).