Neurobioloogias sönade seletus, ingl keelne
outside to inside of the neurone*. This process is energy-dependent as it works against
the gradient of ion concentration.
STIMULUS – An environmental event which may be detected by sensory receptors.
STROKE – An impeded blood supply to the brain, caused by a blood clot or a rupture
of the blood vessel. Deprived of oxygen, which is carried by blood, neurones die in
the affected brain area.
SULCUS – The shallower grooves on the brain surface (deeper groves are called
fissures). Plural = sulci.
SYMPATHETIC NERVOUS SYSTEM – Part of the autonomic nervous system*,
responsible for mobilizing the body’s resources during times of stress and arousal. It
has its ganglia at the level of the thoracic portion of the spinal cord.
SYNAPSE – The junction where an axon approaches another neurone or its extension
(a dendrite, dendritic spine or a soma); it is the point at which neuronal
communication occurs. Nerve impulses travelling down the axon reach the synapse
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