SOMNAMBULISM

A dissociative reaction in which repressed impulses, anxieties or conflicts are acted out during sleep.Somnambulism is more than merely walking in one’s sleep, since...

SPECIFIC ENERGIES

The view that the various kinds of sensory experience, such as touch, taste, and sight, are dependent on the specific nature of the nerve...

SPEECH DISORDERS

Marked deviations in the manner or content of speech. These deviations include speech that is not readily intelligible or audible; definitely unpleasant because of...

SPINAL NERVES

The thirty-one pairs of nerves of the somatic nervous system, which enter and leave the spinal cord between the spinal vertebrae. They are classified...

STARTLE REACTION (Startle Pattern)

An extremely rapid response to a sudden, unexpected stimulus, such as a pistol shot or a face looming up in the darkness.Analysis of the...

STIMULUS (literally “goad”)

In general terms, any event that initiates behavior; or more specifically, any energy change that activates a sense organ.The idea of energy change needs...

STIMULUS-STIMULUS ASSOCIATION (S-S Association, Sensory-Sensory Association)

A learned association between two stimuli.S-S associations are commonly formed when we learn to use one stimulus as a cue to another. For example,...

SUBITIZING

. Perceiving at a glance how many objects are presented without estimating or counting.It takes considerable time for children to learn to count. Ordinarily...

SHERRINGTON, CHARLES SCOTT(1857-1952)

Sherrington, to whom we owe much of our knowledge of nerve activity, obtained his medical degree in 1885, then devoted himself to physiological research...

SUBJECTIVE TONES

Auditory sensations or hallucinations in which certain notes or melodies are heard in the absence of external stimulation.A common type of subjective tone is...

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