The basic thalamus function in the brain is to process and relay movement and sensory information. It is an essential relay station, taking in sensory info
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rmation and then passing it on to the cerebral cortex. The passing of information also happens in the reverse direction. Information is also passed from the cerebral cortex to the thalamus, which is then in turn sent out to the other parts of the body. The thalamus is a limbic system structure and it connects areas of the cerebral cortex that are involved in sensory perception and movement with other parts of the brain and spinal cord that also have a role in sensation and movement. Thus, a major role of the thalamus is related to the motor systems of the body.

The other thalamus function is to regulate the sleeping and wakefulness states. The thalamus has strong reciprocal connections with the cerebral cortex, which in turn form the thalamo-cortico-thamlamic circuits, which take care of consciousness. The thalamus also has a major role to play in regulating arousal, levels of awareness, and activity. Other than these thalamus function, the thalamus serves other purp
oses as well. These functions are linked to the different regions of the thalamus. Filtering the signals is an important thalamus function and any changes in this filtering may show physiological effects.

Any damage to the thalamus can result in comatose situation, which can be reversible or irreversible or can affect the motor activities of the person. The very fact, that the person may lose the
ir consciousness, stress the importance of thalamus function in the body. In conclusion, the thalamus relays sensations, special sense and motor signals to the cerebral cortex and regulate the states of consciousness, sleep and alertness.

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