1. Sensory and Motor Systems Psychology 2617

2. Introduction The nervous system basically goes sensory -> inter -> motor neurons The nervous system basically goes sensory -> inter -> motor neurons You convert energy from the environment to energy in your nervous system You convert energy from the environment to energy in your nervous system This is called transduction This is called transduction Agnosia Agnosia

3. Somatosensory systems Where your body is, what its state is Where your body is, what its state is Proprioception Proprioception Mechanical receptors Mechanical receptors Chemoreceptors Chemoreceptors Thermoreceptors Thermoreceptors Nociceptors Nociceptors Wired contralaterally Wired contralaterally

4. Ascending spinal thalamic tract Ascending spinal thalamic tract Pain and temperature Pain and temperature Dorsal column medial lemniscal pathway Dorsal column medial lemniscal pathway Goes through medial lemniscus to medula -> pons -> midbrain -> thalamus -> cortex Goes through medial lemniscus to medula -> pons -> midbrain -> thalamus -> cortex So again, the thalamus is a sensory clearinghouse or switchboard or whatever So again, the thalamus is a sensory clearinghouse or switchboard or whatever

5. Somatosensory cortex Parietal Parietal Can look at it with a sensory homunculus Can look at it with a sensory homunculus So much more sensory data from more enervated areas, so more cortical processing power needed So much more sensory data from more enervated areas, so more cortical processing power needed

6. Chemical senses Is taste the five types of basic tastes, or is it a pattern? Is taste the five types of basic tastes, or is it a pattern? Fine question…. Fine question…. Cranial nerves to brainstem (medulla) Cranial nerves to brainstem (medulla) Evolutionarily sensible Evolutionarily sensible Smell does not go to the thalamus! Smell does not go to the thalamus! Goes to the olfactory bulb Goes to the olfactory bulb

7. Goes to the limbic system, amygdila and Hp Goes to the limbic system, amygdila and Hp Smell and emotion? Smell and emotion? Well many people say this Well many people say this There is not a whole bunch of data There is not a whole bunch of data Smell disorders do happen though Smell disorders do happen though

8. Vision Basically, it all goes to V1 – V5 in occipital lobe Basically, it all goes to V1 – V5 in occipital lobe Won’t dwell on this as we did lots last term Won’t dwell on this as we did lots last term Book does a decent job anyway Book does a decent job anyway Blindsight Blindsight Neglect Neglect

9. Audition Hairlike receptors to detect frequency Hairlike receptors to detect frequency Temporal lobe Temporal lobe Heschl’s gyrus Heschl’s gyrus Frequency bands Frequency bands Not quite as rigid as the visual system but some bands are more sensitive to certain frequencies Not quite as rigid as the visual system but some bands are more sensitive to certain frequencies

10. Speech and lingo Heschl’s -> Wernicke’s Heschl’s -> Wernicke’s Makes sense of speech Makes sense of speech Now other cortical areas are needed to interpret meaning Now other cortical areas are needed to interpret meaning Wernicke’s aphasia Wernicke’s aphasia Left meaning Left meaning Right, intent Right, intent Broca’s for speaking Broca’s for speaking

11. This is cool People that use ASL as their first language use Broca’s and Wernicke’s as we do! People that use ASL as their first language use Broca’s and Wernicke’s as we do! So they are not necessarily for say auditory processing So they are not necessarily for say auditory processing They are for language They are for language Only we have ‘em Only we have ‘em

12. Motor systems Primary motor does fine detail of movement Primary motor does fine detail of movement Secondary motor does organization and timing of movement Secondary motor does organization and timing of movement Disocciable Disocciable Cingulate motor area Cingulate motor area P300 P300

13. Subcortical motor processing Basal ganglia and cerebellum, automatic Basal ganglia and cerebellum, automatic Parkinson’s disease and substantia negra of the basal ganglia Parkinson’s disease and substantia negra of the basal ganglia Huntington’s affects the cuadate, jerky movement Huntington’s affects the cuadate, jerky movement

14. conclusions This is just a taste This is just a taste This stuff is very complex This stuff is very complex May be where ‘consciousness’ comes from May be where ‘consciousness’ comes from Disorders are possible, more on that later Disorders are possible, more on that later