medulla definition psychology
Medulla in general means the inner part, and derives from the Latin word for 'marrow'. In medicine it is contrasted to the cortex. Examples of its use include: 1  the medulla oblongata, a part of the brain stem. 2  the renal medulla, a part of the kidney. 3  the adrenal medulla, a part of the adrenal gland. 4  medulla spinalis, another term for spinal cord.