Ruffini cylinder Interpret stretch of skin Pacinian corpuscle Vibration and

Ruffini cylinder interpret stretch of skin pacinian

This preview shows page 8 - 10 out of 10 pages.

Ruffini cylinder: Interpret stretch of skin. Pacinian corpuscle: Vibration and texture/ o OTHER SKIN RECEPTORS Thermoreceptors: Sensory receptor that signals information about changes in skin temperature . Two distinct populations; warmth and cold fibres Also respond to chemical stimuli – why capsaicin feels hot and menthol cool. Nociceptors : Sensory receptor that transmits information about noxious (painful) stimulation that causes damage or potential damage to skin. Mix of signals transduced: mechanical, thermal, chemical. Pain: Subjective and context-dependent. Adaptive response. o SOMATOSENSORY CORTEX Relayed via thalamus to contralateral parietal lobe. Somatotopic organisation . Spatially mapped in the somatosensory cortex in correspondence to spatial events on the skin Adjacent point on you skin are represented by adjacent points on somatosensory cortex o SENSORY HOMONCULUS What we would look like if it was relative to the somatosensory cortex.
Image of page 8

Subscribe to view the full document.

o o SOMATOSENSORY PROCESSING Somatosensory cortex linked to play behaviour and perhaps emotional processing. Rat tickling causes them emit to Ultra-Sonic Vocalisations (USVs) interpreted as giggling. Neural correlate of tickling: When the rat was tickled, deep layer somatosensory nerve cells active just before USVs (giggling) emitted. When rats are anxious -> no somatosensory activation and no ”giggling -> mood affects our sensation and perception. NARRATIVE o HUMAN STORY Heider-Simmel 1944 “Attribution of causality” What kind of person is the small triangle? Why did the circle go in the house? Why did the big triangle break the house? Adult human perception Probability guessing experiment: Which light will flash? Rats & children <4yr old maximize. Humans >4yr old frequency match Frequency matching: using the frequency of previous occurrences with guesses -> looking for cause and effect to create a theory. o NARRATIVE IN THE BRAIN Narrative is a use of language to describe a series of related events. Language is strongly associated with the left- hemisphere of the brain. Language across both hemispheres? Whilst the left visual field is directed to the right visual cortex, connections between the hemispheres allows the right visual field to send information to the left hemisphere o THE INTERPRETER Neuro-psychological concept proposed by Michael Gazzaniga & Joseph LeDoux Explanations (narrative) are generated by the left-hemisphere (no known exact brain area/ circuit within the left hemisphere). Combines already known knowledge with ongoing events to infer causation. Thought to act post-hoc to events that we experience. The interpreter = left-brain process which generates narrative. SUMMARY o The physical stimuli for each sense o Methods of transduction: vision, hearing, touch into neural activity o How sensory modalities interact with each other o Unconscious and conscious forms of perception o How do we construct internal representations of the external world
Image of page 9
Image of page 10
  • Winter '10
  • Fountain,M

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Ask Expert Tutors You can ask bonus questions You can ask questions ( expire soon) You can ask questions (will expire )
Answers in as fast as 15 minutes