Download Brain Facts (Gray Matter) by Louis Vera-portocarrero, Eric H. Chudler PDF

By Louis Vera-portocarrero, Eric H. Chudler

Identifies the bizarre evidence that encompass the examine of the human mind. This identify additionally takes a glance at how the mind works, the place within the mind its significant capabilities dwell, and the way the various components of the mind have interaction with one another to supply the human adventure.

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As the receptor in the skin is stimulated, sensory neurons transmit the impulse to the spinal cord, where other neurons are activated. Then, impulses are directed through motor neurons to flexor muscles that contract in response. Simultaneously, opposing muscles are relaxed so that the injured limb can be quickly withdrawn from the harmful source of stimulation. From the information above, it is obvious that a great deal of motor control happens at the spinal cord level. Neuronal circuits in the spinal cord organize the order and timing of the motor activity underlying locomotion.

The cerebral cortex in these animals is removed experimentally, but they are still able Curare For thousands of years, native people in the jungles of South America have used extremely potent poison arrows. The poison used in these arrows is called curare, which is a dried extract obtained from the vine Strychnos toxifera. Death from curare is caused by asphyxia, because the respiratory muscles become relaxed and then paralyzed. The principal chemicals of curare are alkaloids that affect transmission between nerve and muscle.

Induced hypothermia protects organs in cardiac and transplantation surgery and preserves isolated tissues such as blood and skin. Profound cold (cryotherapy) is used to destroy tissues and preserve cells such as sperm. Accidental hypothermia occurs if heat loss exceeds heat production or maintenance. Incidental hypothermia develops in neurologic, metabolic, and dermatologic diseases that interfere with body temperature control, including hypothyroidism, diabetes, stroke, and a brain tumor affecting the hypothalamus.

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