1.3- Anatomy of the Cerebrum Flashcards
What are the three parts of the brain?
Cerebrum, Cerebellum, and Brain Stem
True or False: If laid flat, the brain neurons would fit into cranium.
False. If laid flat, the neurons would cover approx. 1 sq meter (size of opened up newspaper).
At what age of development does the brain begin to gather forming an irregular surface?
6 weeks
- ________ - depression
2. ________ - ridge
- Sulcrus- depression
2. Gyrus- ridge
What is the brain covered in ridges (gyri) and depressions (sulci)?
Allows a large surface area to be compacted into a small space (cranium)
The cerebrum is divided into 2 hemispheres. What hemisphere is the analytical side? The artistic side?
Left hemisphere- analytical side (science & math)
Right hemisphere- artistic side (creativity)
What is the term for the other surface later of the cerebrum composed of gray matter?
Cerebral cortex
What term describes the cell bodies and synapses of the neurons?
Gray matter
What term makes up most of the inner surface of the cerebrum?
White matter
What part of the cerebrum processes and integrates info?
Gray Matter
What part of the cerebrum is composed of axonal tracts?
White matter
Why is white matter the color white?
because of the myelin
What part of the cerebrum transmits information?
White matter
What are the dark areas within the white matter deep in the cerebrum?
Deep nuclear areas
What is the purpose of the deep nuclear areas?
made of groups of cells dedicated to similar/special functions
List the composition layers of the cerebrum from the outer layer towards the inner layer.
- Cerebral cortex (composed of gray matter)
- White matter (composed of axonal tracts)
- Deep nuclear areas (dedicated to similar functions)
What is the purpose of gray matter? white matter?
Gray matter- processes and integrates info
White matter- transmits info
What divides the hemispheres into right and left halves?
Longitudinal fissure
What runs horizontally, divides the temporal lobe?
Lateral (Sylvian) fissure
What is not as deep as a fissure, divides Frontal from the Parietal lobe?
Central Sulcus
What connects the hemispheres of the cerebrum?
Corpus Collosum
What is a group of axons that transmits info? What is another name for this?
Fibers
Tracts
What are axons running from cortex down out of hemisphere into the SC?
Projection fibers
leave via spinal cord…out of brain to periphery
What runs from 1 hemisphere to the other through the corpus collosum and helps the hemispheres communicate?
Commissural fibers