Neuroscience CH 4
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Examining autopsy tissue has the allowance but also the drawback of…
Allowing neuroscientists to see what our brains look like but has the obvious drawbacks of telling them about how the systems work alive
What do neuropsychologists do? What does this help us conquer?
test the behaviour of patients with damage to certain parts of their brain. This allows us to know which parts of the brain do what depending on what part of the brain is damaged and what the patient therefore lacks in.
What is the drawback of neuropschologist work?
Inferences are made about the brain without possible smaller abnormalities being recognized that may cause the problem
Electroencephalograms are used for
recording brain activity or brain waves from the surface of the scalp during certain states such as awake or asleep
What is lesioning
destroying specific brain areas to see how behaviour changes
What are neuroimaging techniques used for
show visual images in awake humans
MRI, fMRI, PET, CT scans are all
neuroimaging techniques
Clinical observation allows
discovering of a number of brain disorders
What is a brain lesion?
Experimentally destroys brain tissue to study animal behaviours after such destruction
What is PET?
Positron Emission Tomography Scan is a visual display of brain activity that detects a radioactive form of glucose while the brain performs a given task
What is MRI scan?
Magnetic resonance imaging uses magnetic fields and radio waves to produce computer generated images that distinguish among different types of brain tissue
What are neurone?
(nerve cell) main building block of the brain
What are the three types of neurons?
sensory, motor, interneuron
Which neurone gathers sensory info
sensory
which neurone communicates info to muscles
motor
which neurone carries info between neurone in the brain and the spinal cord?
interneuron
Which neuron is unipolar?
interneuron
which neurone is bipolar?
sensory
which neurone is multipolar
motor
What is a cell body?
it contains the nucleus which provides energy for the neuron
What are dendrites
receive messages from other neurons
what does the axon fo
carries info away from the cell body
what does the axon terminals do
transmits signals to the dendrites on the next neurone
What is the myelin sheath?
a substance that speeds up the firing of the neuron