Neuropsych+L06+full+notes

Neuropsych+L06+full+notes - Slide 1 Slide 2 Quick Review...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Slide 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Slide 2 Quick Review 1. What are the characteristics of the2 main categories of cerebrovascular accident? 2. What are the different types of histology used to visualize the brain? 3. When considering the different ways to visualize the brain, list their relative advantages and disadvantages.
Background image of page 2
Slide 3 Neuropsych Methods & Assessment: Outline I. Neuropsych Methods I. Brain injury II. Visualizing the brain 1. Correlating brain anatomy with behavior 2. Recording brain activity during behavior 3. Examining the effects of stimulating particular parts of the brain II. Neuropsych Assessment
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Slide 4 Methods of Visualizing the Brain Histology Radiological Procedures using X-rays General X-ray images Computerized Axial Tomography (CT or CAT) Dynamic imaging Positron Emission Tomography (PET) Magnetic Resonance Imaging: MRI & Functional MRI (fMRI) Electrophysiological Procedures Histology & radiology: structure, anatomy Dynamic imaging: record & manipulate ongoing changes in brain activity (e.g., electrical activity of cells, biochemical events, brain metabolism & blood flow) Electrophysiological: detects changes in electrical activity of neurons
Background image of page 4
Slide 5 Electrophysiologic Procedures Electroencephalography Evoked potential Magnetoencephalography Electrical stimulation Intracranial brain stimulation Transcranial Magnetic Stimulation To get at the brain’s electrical activity, a number of procedures have been developed: 1) single - cell recordings, 2) electroencephalographic recording, 3) event-related potentials
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Slide 6 Electroencephalographic (EEG) recording Recording of voltage fluctuations, “brain waves”, by voltmeter placed on skull Valuable tool for Studying sleep Monitoring the depth of anesthesia Studying normal brain function Amplitudes reflect how “near” active cells are, & degree of activity Use amplitude (height of brain waves) & frequency (# waves/second) to identify patterns Neurons emit rhythmic waves, & if place a number of electrodes on scalp, the differences in amplitude (height of brain waves) will reflect location of most active neurons. Not everyone displays the same types of waves (some have no alpha waves), & individuals display different patterns to different degrees. Measures not just arousal & relaxation, but also measures different sleep patterns. Often used to identify epilepsy, so will talk about this at greater length when we get to that topic.
Background image of page 6
Slide 7 EEG: Different Patterns Reflect Different States of Consciousness Beta (β) rhythm Alpha (α) waves Delta (δ) waves This slide illustrates different EEG patterns, based on consciousness level; Beta: Can record this pattern from pretty much anywhere on skull in an awake organism (humans & animals) Alpha: detected at back of head (occipital lobe) Coma: when brain ceases to function (“brain death”), the EEG becomes a flat line Since this technique is so good at identifying different states of consciousness, commonly used
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 26

Neuropsych+L06+full+notes - Slide 1 Slide 2 Quick Review...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online