Transcript Higher nervous activity of a human

Physiological bases
of physical work
Type of nervous system
 Type of nervous system determines rate
of creation of new conditioned reflexes,
strength and stability of these reflexes,
intensity of external and internal
inhibition, rate of irradiation and
concentration of nervous processes, the
capacity for induction and less or grater
possibility for development of
abnormalities of higher nervous activity.
Structure
of behavioural act
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According to theory of functional systems (Anochking)
there are such stages of behavioural act:
1) afferent synthesis; 2) taking of decision;
3) acceptor of result of action;
4) efferent synthesis (or programming of action);
5) performing of action;
6) evaluation of final result of action.
Due to converging and processing of both sensory
information and memory traces afferent synthesis in
the brain is performed. Taking of decision is based on
afferent synthesis by choosing optimal variant of
action.
Neuronal mechanisms of
behaviour
 In the very lowest animals olfactory cortex plays essential roles in
determining whether the animal eats a particular food, whether the
smell of a particular object suggest danger, and whether the odour
is sexually inviting, thus making decisions that are of life-or-death
importance. The hippocampus originated as part of olfactory
cortex.
 Very early in the evolutionary development of the brain, the
hippocampus presumably becomes a critical decision-making
neuronal mechanism, determining the importance of the incoming
sensory signals. Once this critical decision-making capability had
been established, presumably the remainder of the brain began to
call on it for the same decision making. Therefore, if the
hippocampus says that a neuronal signal is important, the
information is likely to be committed to memory.
 Thus, a person rapidly become habituated to indifferent stimuli but
learns assiduously any sensory experience that causes either
pleasure or pain. It has been suggested that hippocampus
provides the drive that causes translation of short-term memory
into long-term memory.
Biological feedback for
coping stress