Neuroscientist’s fallacy is to refer to these as unique systems.
The parietal occipital sulcus (not shown) separates parietal & occipital lobes.
Left visual field information is sensed by photoreceptors on medial half of left eye and lateral half of right eye. Right visual field is sensed on medial half of right eye and lateral half of left eye.
Dorsal pathway proceeds to posterior parietal cortex & ventral stream to inferior temporal cortex.
Cochlea is Latin for snail shell (2.5 turns). High frequency sounds are interpreted near oval window and low frequency near apex.
PrecentralGyrus (primary motor cortex) & Postcentralgyrus (primary sensory cortex)
Medial Column: back, neck, abdomen, pelvis; Lateral Column: arms (cervical enlargement) & legs (thoracic enlagement)
Stimulating one nuclei in the hypothalamus can result in undirected expression of emotion (“sham rage”) whereas another results in biting rats neck & killing it without emotional expression (“silent attack”).
Bilateral lesions of the amygdala may present with hypersexuality, hyperorality, hyperphagia, and hyperdocility.
Brodman’s areas is a cytoarchitectural way of identifying different brain areas. This is best for post-mortem but is less useful for living patients.
AuditoryCochlea: Coiled, bony, fluid-filled tube in theinner ear that transforms sound vibrations toauditory signals.Carpet Explanation http://www.youtube.com/watch?NR=1&feature=fvwp&v=FjbcAH3dL0s
Localization of Sound1. Intensity differences2. Time differences
Vestibular • Semicircular Canals: mediate balance & movement of head
Taste Traditionally, taste sensations consisted of sweet,salty, sour, and bitter tastes. Recently, receptors fora fifth taste have been discovered called “Umami”. Sweet Sour Salty Bitter Umami (Fresh Chicken)