What is a transient ischemic attack (TIA)? The primary role of the brain is to send signals to the body for motor function and to receive signals through the five senses (sight, hearing, touch, smell, and taste), and to respond to them. The brain processes information through conscious thought, and unconsciously through nerve systems that control basic bodily functions, like heart rate, breathing, and temperature control. In simple terms: The brain is arranged so that the right side of the brain controls the left side of the body, and the left side of the brain controls the right of the body. Vision is located in the back of the brain (occiput), and balance and coordination are located at the bottom of the brain (cerebellum). Blood supply to the brain comes from the carotid arteries that are located in the front of the neck, and the vertebral arteries that run in the back of the neck through small canals in the bony spine (vertebrae) of the neck. All of these connect at a junction of blood vessels located in the base of the brain (called the Circle of Willis), and from there smaller arteries supply the brain with oxygen and nutrients.
Posted on: Wed, 13 Nov 2013 23:09:25 +0000
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