1 Flashcards
Sensory Part of the Nervous System These sensations can either cause
immediate reaction from the brain, or stored as memory and determine body reactions later.
sensory system transmits sensory information
from the receptors to the central nervous system.
• This information is conducted to multiple sensory
areas
(1) the spinal cord;
(2) the medulla, pons, and mesencephalon of the brain;
(3) the cerebellum;
(4)the thalamus; and
(5) areas of the cerebral cortex.
The skeletal muscles can be controlled from many levels of the central nervous system, including:
1) the spinal cord.
(2) brain stem.
(3) the basal ganglia. (4) the cerebellum.
(5) the motor cortex.
The lower regions are concerned with automatic muscle responses to sensory stimuli, while
• The higher regions are concerned with complex
muscle movements controlled by the brain.
Higher Brain or Cortical Level able to
The cerebral cortex is an extremely large
memory storehouse.
• The cerebral cortex is essential for most of
our thought processes, but it cannot function
by itself.
In spinal animal many highly organized spinal
cord functions still occur
- walking movements
- reflexes that withdraw portions of the body from painful objects
- Reflexes that stiffen the legs to support the body against gravity
- reflexes that control local blood vessels, GIT movements, or urinary excretion
Lower Brain or Subcortical Level
After destruction of the cortex an animal can
still be able to
1. control of arterial pressure and respiration
2. Control of equilibrium
3. Perform Feeding reflexes, such as salivation and licking of the lips
4. Show emotional patterns, such as excitement, anger, sexual response, reactions to pain, and pleasure
Bell magandie law
The ventral spinal root transmit motor
Posterior root transmit sensory