spinal tap

(redirected from Brainhammer)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

spinal tap:

see spinal puncturespinal puncture,
surgical penetration of the spinal canal by a hollow needle introduced between two of the lumbar vertebrae. The arrangement permits injection of antibiotics or anesthetics (see anesthesia) as well as dyes to facilitate X-ray studies.
..... Click the link for more information.
.