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NAUTILUS EYE

consist of a spherical cavity which is coated in photosensitive cells which respond to light which enters through a small

NECROSIS

is the natural process which gives rise to dead cells, such as neurons and muscle cells, in the human body.

NEGATION

in the context of Jean Piaget's theory of cognitive development, negation is the process where an individual realises a process

NEGATIVE INDUCTION

is the effect of a diminishing response to a stimulus in an experiment which would not have happened in the

NEGATIVE-STATE-RELIEF MODEL

is the theory that helping behaviour is used during times of stress and anxiety to avoid negative moods.

NEOCORTEX

is part of the cerebral cortex containing six layers of cells. The neocortex includes the primary sensory, motor cortex and

NEOPHENOMENOLOGY

first attributed to U.S. psychologists donal Snvff (1904 - 1967) and Arthur W. Combs (1912 - 1999) which explains the

NERVE GROWTH FACTOR (NGF)

stimulates growth in the spinal ganglia and in the ganglia of the SNS, by introducing an endogenous polypeptide.