Unit 4- the brain pt 3 Flashcards
Nucleus
a bundle of cells that work together.
pituitary dwarfism
a condition in which a person grows very slowly and as an adult typically shorter than an average adult.
reflex arc
reflexes occur when a signal is sent from a sensory organ to the spinal cord. It then processes that information instead of passing it onto the brain.
“split brain”
When the two hemispheres can’t communicate. Both hemispheres act without knowledge of the other.
ablation
is the process of removing or destroying some brain tissue leaving lesions or tissue damaged from the surgery behind.
autopsy
a postmortem examination to determine the cause of death- offers another tool for brain study.
computerized axial tomography
(CT or CAT scan)
involves taking 2D photos to look at organs and other body parts
deep brain stimulation
a less invasive method of altering the brain to eliminate behavior symptoms.
electroencephalogram
(EEG)
attach electrodes to a person’s scalp to record the brain waves.
Functional Magnetic Resonance Imaging
(fMRI)
uses magnetic Resonance Imaging to see blood flow and oxygen metabolism to infer brain activity .
Hemispherectomy
removing the diseased part of the brain
lesions/ lesioning
damaging certain parts of the brain and nothing changes in behavior.
MRI
is an imaging technique that is used to see internal organs. Unlike X-rays, this shows detailed images of the body. It shows damage to ligaments and cartilage after a sport injury, such as a severely twisted ankle or knee.
Positron Emission Tomography(PET Scan)
allows researchers to examine slices of deep brain structures that had previously been seen during surgery. During the PET scan scientist inject a radioactive “tracker” molecule into the bloodstream to measure the amount of energy the brain uses during particular activities,
Roger Sperry and Micheal Gazzaniga
Showed that visual information got stuck in one hemisphere
