postcostal anastomosis

post·cos·tal a·nas·to·mo·sis

longitudinal anastomosis of intersegmental arteries giving rise to the vertebral artery.

post·cos·tal a·nas·to·mo·sis

(pōst-kos'tăl ă-nas'tŏ-mō'sis)
Longitudinal anastomosis of intersegmental arteries giving rise to the vertebral artery.
References in periodicals archive ?
Usually the first part of vertebral artery develops from proximal part of dorsal branch of seventh cervical intersegmental artery proximal to postcostal anastomosis.
The second part is derived from longitudinal communications of the postcostal anastomosis with the consequent regression of the stems of the upper six intersegmental arteries.