Biopsych Review 2 - Biopsychology Review Research Methods...

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Biopsychology Review Research Methods Fos • fMRI o The use of MRI to measure the hemodynamic response related to neural activity in the brain or spinal cord of humans or other animals. It is one of the most recently developed forms of neuroimaging. • CAT scan o A medical imaging method employing tomography where digital geometry processing is used to generate a three-dimensional image of the internals of an object from a large series of two-dimensional X-ray images taken around a single axis of rotation. • Retrograde tracing • Electron microscope Visual System What are the receptor cells and how do they process information? What specific information do they process? Retina Names of receptor – cones and rods o Rods detect black and white o Cones detect color Visual Pathway- Retina Optic Nerve LGN Chiasm VI (primary visual cortex) o Information in the right and left eyes interchange in the primary visual cortex How and where do action potentials occur? Ganglion cells are the first cells that undergo an action potential Cones : Ganglion cells = 1:1 Pathways for black and white processing Rods see black and white Pathways for color processing Cones see color o “Blobs” – color, are randomly positioned in layers 1 through 6 Receptive fields for cells in the retina and cells in the primary visual cortex Rods are found primarily in the periphery of the retina and are used to see at low levels of light. Cones are found primarily in the center (or fovea) of the retina.
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Ultimately, how are objects recognized?
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