Calcarine spur
Calcar avis
Definition
On the medial wall of the posterior cornu of the lateral ventricle is a longitudinal eminence, the calcar avis', which is an involution of the ventricular wall produced by the calcarine fissure.
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).
