Lecture 6

Lecture 6 - Lecture 6 Exam 2: reading-chapter 5,6,12 (skip...

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Lecture 6 07/05/2007 19:02:00 Exam 2: reading-chapter 5,6,12 (skip ch. 7, sections 6.3) Ch. 8, 13 after exam Review session Sunday 5-6:30pm Review (in slides) Visual pathway: retina  thalamus   cortex o V1 V2  dorsal vs. ventral streams (where/how vs. ‘what’) Ventral stream: o Inferotemporal cortex-shapes, faces (fusiform face area) o Damage to ventral stream-impairments in object recognition,  sometimes prospagnosia o Damage to dorsal stream? Dorsal stream lesions Damage to the dorsal stream may result in an inability to accurately reach out  to grasp objects (until touched) Vision and recognition are normal The Neural Basis of Motion Perception (in slides) Motion perception involves a variety of brain areas in all four lobes of the  cortex The middle-temporal cortex (MT/V5) responds to a stimulus moving in a  particular direction ,independent of size, shape, etc. –theses cells respond to  phots that imply movement (people running) Cells in the dorsal part of the medial superior The Neural Basis of Visual Perception
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Motion blindness refers to the inability ot determine the direction, speed and  whether objects are moving o Likely caused by damage in area MT Some people are blind epcept for the ability to detect which direction  something is moving (blindsight included here) o Area MT probably gets some visual input despite significant damage to  V1 Emotion (ch. 12) Emotional states have 3 aspects o 1. Cognition- appraisal of event/situation o 2. Readiness of action – product of autonomic NS endocrine function o 3. Feeling-emotional aspect James-Lange theory of emotion o Event  appraisal  action (including physiological)  emotional  feeling Emphasizing physiology, scared because of heart racing o Emphasize physiological determinants of emotion: emotion-induced  stimuli perceived by brain (in slides) This triggers visceral changes: Autonomic (involun) and somatic (voluntary) Which then trigger the emotional “experience” o James-Lange schematic Your quick cognitive  appraisal  of the event allows you to  distinguish b/w emotions with similar physiologic components  (e.g., excited heart racing vs. scared heart racing) o Example Predicts 1. Increasing one’s bodily response should enhance an  emotion
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2. People with a weak autonomic response or skeletal  response should feel less emotion stimulus: a guy in the mask from scream, 2 and 3 jumps  from our bedroom closet  appraisal: not a good scene  for me physiological arousal and overt behaviors  specifies to an emotion (shake, rattle and roll outta 
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This note was uploaded on 04/15/2008 for the course PSYC 106 taught by Professor Sage during the Spring '07 term at UCSD.

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Lecture 6 - Lecture 6 Exam 2: reading-chapter 5,6,12 (skip...

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