Lectures10-12

Lectures10-12 - Lectures 10-12: Sensory Systems Reading:...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Lectures 10-12: Sensory Systems Lectures 10-12: Sensory Systems Reading : chapter 6, except section on special senses
Background image of page 1

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

View Full DocumentRight Arrow Icon
Conduction speed on myelinated axons ~ 120 m/s Longest axon ~ meter long (big toe to spinal cord) Total travel time for a nerve impulse from head to toe: 10 ms + 10 ms + 1-2 ms per synapse = ~ 25 ms Brain sensory inputs motor outputs Body Sensory-motor transformation
Background image of page 2
Sensory Systems - 6 major sensory systems in the mammalian brain, each is organized according to a common anatomical plan. - Visual System vision, sleep-waking cycle - Auditory System hearing - Somatosensory System touch, pain, temperature, proprioception - Olfactory System * smell - Gustatory System taste - Vestibular System posture and balance
Background image of page 3

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

View Full DocumentRight Arrow Icon
General Organization: receptors - stimuli are transduced by receptors grouped together to form a sensory surface transduction - the conversion of stimulus energy to a neuronal signal receptor - a cell whose axon or dendrite is capable of transduction in a particular sensory modality Receptor Relay Nuclei Thalamus Cerebral Cortex Primary Cerebral Cortex Secondary relay nuclei - Groups of neurons located in the central nervous system that process signals from receptor neurons and transmit signals to the thalamus. thalamus - Groups of neurons, organized into nuclei within the thalamus, that process signals from relay nuclei and transmit signals to the cerebral cortex. primary cerebral cortex - Anatomically defined areas of the cerebral cortex that process signals from the thalamus and transmit signals to secondary cerebral cortex. secondary cerebral cortex - Anatomically defined areas of the cerebral cortex that process signals from primary sensory cortex and transmit signals to association cortex, motor cortex and subcortical structures.
Background image of page 4
Concepts in Receptor Physiology Receptor potential Modality specificity Receptive field Maps Lateral inhibition Acuity
Background image of page 5

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

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 38

Lectures10-12 - Lectures 10-12: Sensory Systems Reading:...

This preview shows document pages 1 - 6. Sign up to view the full document.

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