Anatomy and Cell Biology 3319 Lecture : Anatomy Notes

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purplejackal117

20 Feb 2012

School

Western University

Department

Anatomy and Cell Biology

Course

Anatomy and Cell Biology 3319

Professor

Peter Merrifield

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Document Summary

The deep gray matter of the cerebrum consists of the basal ganglia, the deepest layer of large collections of neuronal cell bodies. The cerebral white matter contains many different fibres that connect all the parts of the brain together. Association fibres connect different parts of the same hemisphere. Short association fibres are connections within the same lobe or gyrus. Long association fibres connect widely separated lobes, and the info is sent from one lobe or gyrus to another. Commissural fibres connect the left and right hemispheres. The largest commissural fibre is the corpus callosum, which lies superior to the lateral ventricles and deep within the longitudinal fissure. Projection fibres either go from the cerebral cortex down to the spinal cord or from the spinal cord up to the cerebral cortex. It is through these fibres that sensory information reaches the cerebral cortex and motor instructions leave it. These fibres run vertically, while the other two types run horizontally.

Related Questions

1.Cerebrum or cerebral hemispheres-the ratâs is smooth and thehuman is very convoluted and folded. Do you think this makes adifference and if so how would it make a difference ?
2. Cerebellum has three parts or lobes. What are the functions ofthe three lobes?
3.Medulla oblongata connects the brain with the spinal cord. Itfunctions to regulate what ?
4.Spinal cord relays information back and forth between the twonervous systems called what ?
5. Corpus callosum is white and connects the two hemispheres. Whydo you think it is white?

whitewasp554

Nervous System questions.

1-The âcerebral medullaâ is composed of white matter. What is white matter composed of? What is the difference between a nerve fiber and a nerve tract?

2-What are the functions of commissural fibers? Association fibers? Projection fibers? Why does the right brain control the left side of the body? Why is pain on the left side of the body sensed in the right brain?

3-An individual has a stroke that affects the right hemisphere of their brain resulting in a 98% loss of function. According to brain lateralization, what traits would we expect this individual to primarily possess? Why might a genius be defined as an individual that has equal âaccessâ to both hemispheres of their brain?

Nervous System (CNS), answer them all with just few words no need for details and I will rate you.

1-What is the forebrain composed of? The cerebrum makes up about 80% of the brain. What composes the other 20%? The cerebrum is divided into two separate hemispheres (a right and a left), yet the two intercommunicate. What structure of the brain facilitates this cross-talk?

2-The cerebral cortex is an aggregation of gray matter and glial cells. What is the gray matter composed of? What are the glial cells found in the cerebral cortex?

3-Which lobe of the cerebrum is responsible for you recognizing yourself in the mirror in the morning? Which lobe of the cerebrum receives afferent information from the integument? At some point in your life, someone locked up their brakes in front of you on the road. The bright-red brake lights were a sign of impending danger and induced a release of adrenaline in your body. Even today, when brake lights come on in front of you on the road, even if there is clearly no impending danger, you might still feel an adrenaline response. This is an example of how our emotions and our memories are intimately related. Where does this occur in the cerebrum?

Anatomy and Cell Biology 3319 Lecture : Anatomy Notes

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