viernes, 25 de marzo de 2011

Cerebrum

First at all, if you want, in this link you can find a brief overview of the nervous system. The teacher in the video speak very slowly and it's easy to understand but, maybe, too much information for 3º E.S.O.
In this post we are going to study the cerebrum. As it have a los of difficult names maybe this funny video can help you to remember them.
The cerebrum is what most people would think of as the "brain." Mammals (including humans), have the largest and most well-developed cerebrum among all species.
The cerebrum lies on top of the brainstem. It’s divided into a right and left half. Each half of the cerebrum is called a hemisphere. Each of these hemispheres has an outer layer of grey matter (body cells of neurons) called the cerebral cortex that is supported by an inner layer of white matter (myelinated axons). The two cerebral hemispheres are connected to each other at the corpus callosum. It lies deep inside the brain and carries messages back and forth between the two hemispheres. The right hemisphere controls the left side of the body, and the left hemisphere controls the right side of the body.
The cerebral cortex is the highly-folded outer layer of the cerebrum that is between 2 mm and 4 mm thick. The lobes that make up the cerebral cortex, shown in Figure, are named after the skull bones that cover those areas of the brain. Each hemisphere of the cerebrum is divided into four parts called lobes. The four lobes are the frontal, parietal, temporal, and occipital lobes. Each lobe has different functions. Some of the functions are listed in Table:
Cerebral Lobes and Their Functions


































LobeMain Function(s)
FrontalSpeech, thinking, touch
ParietalSpeech, taste, reading
TemporalHearing, smell
OccipitalSight

The cerebral cortex controls higher functions, such as consciousness, reasoning, emotions, and language. It also controls sensory functions such as touch, taste, smell, and responses to external stimuli.
Magnetic resonance imaging

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