In its "specializations" the cerebral cortex is divided into these zones (diagram 154): sensitive - receive impulses from various receptors and appe

Cortex

In its "specializations" the cerebral cortex is divided into these zones (diagram 154): sensitive — receive impulses from various receptors and appear the cortical end of the analyzer; motor — send directive impulses to the "working" bodies; associative — interconnects motor with sensitive areas; analyzes and stores information, generates a certain answer and decision taking into account the previous experience (extracting it from the memory cells). Major mental phenomena: learning, conditioned reflexes, memory, language, thinking, behavior, consciousness are associated with associative areas.

Each body has its "representation" in the cortex. The more important the role he plays in the life of the organism, the greater portion of the cerebral cortex responsible for the perception of it (diagram 155). The destruction of the cerebral cortex leads to loss of the ability to learn, to think, to understand it, that is, to the loss of social functions.

Both hemispheres, although similar in structure, differ in the area and the number of sensory and motor areas. Each person has one of the hemispheres is dominant. In right-handers — it is the left hemisphere, left-handed — right. Hemispheres are interconnected by the corpus callosum, which provides the exchange of information between them. Main role in thinking of most people is played by the left hemisphere. It has the speech centers, writing, counting, reading and memory ones. The right hemisphere — has center of musical and abstract memory, memorizing geometric and artistic images. Taken from http://worldofschool.org

Diagram 154. Sensitive and motor cortex: 1 — frontal; 2 — premotor; 3 — motor; 4 — primary somatosensory; 5 — somatosensory associative; 6 — visual associative; 7 — the primary visual: 8 — Wernicke's area (speech understanding), 9 — auditory associative; 10 — primary auditory; 11 — Broca's area (speech motor control)
Diagram 155. "Representations" of the body parts in the cerebral cortex; on the left — sensitive areas, on the right — motor: 1 — the internal organs; 2 — pharynx; 3 — language; 4 — teeth; 5 — lips; 6 — face; 7 — the nose; 8 — eye; 9 — I finger; 10 — II finger; 11 — III finger; 12 — IV finger; 13 — V finger; 14 — wrist; 15 — carpus; 16 — the forearm; 17 — elbow; 18 — ulnar fovea; 19 — shoulder; 20 — head; 21 — neck; 22 — the body; 23 — stomach; 24 — hip; 25 — shin; 26 — foot; 27 — shin and knee; 28 — the eyebrows; 29 — chin
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Questions:
  • Name areas of the cerebral cortex.