Sensory Pathways – Sensory Processing (PSY, BIO)

by Tarry Ahuja, MD

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    Okay, now -- now that we have a sensory stimulus coming in, we need to detect that and that needs to go through a sensory pathway. So it’s a really, really cool unique thing. And now with all these different types of sensory receptors, that allows us to actually capture all the different senses that we’re inundated with. And again, I think you and I all take this for granted when we’re thinking of all the different stimulus that we, on an everyday basis, deal with, interact with and assess. But when you start getting down to the physiology behind in the fact that, “Oh my God. We actually detect a lot of different things.” It’s super cool So sensory receptors are sensory nerves that are -- one of two things, either a cell or nerve endings. And they can detect both internal and external stimulus. So things that are happening within our own bodies or things that are happening from the outside affecting our bodies. Activation initiates a signal transduction by creating graded or action potential. So you remember from the biology sections, an action potential has an all or none activation. It causes opening of voltage-gated ion channels, you have influx of ions. That whole process can be initiated through activation of these, of these receptors. So sensory pathways begin with the receptor. The receptor then gets activated and it goes through some ganglion cells and then through another process, it goes through the spinal cord, it gets sent up to the central nervous system where it’s processed. So the idea is, think of your body as an antenna and it’s trying to detect all types of stimulus. And all that information gets converted into whatever medium it is, into basically an electrical signal, because everything in our...

    About the Lecture

    The lecture Sensory Pathways – Sensory Processing (PSY, BIO) by Tarry Ahuja, MD is from the course Sensing the Environment.

    Included Quiz Questions

    1. Sensory receptors
    2. Motor neuron
    3. Efferent nerve fiber
    4. Reflex arc
    5. Muscles
    1. Stimulus, sensory receptor, sensory ganglion cell, spinal cord, brain
    2. Sensory receptor, spinal cord, motor neuron, ganglion
    3. Stimulus, sensory ganglion cell, brain
    4. Sensory receptor, sensory ganglion cell, brain, response
    5. Brain, ganglion cell, nerve, response
    1. ...thermoreceptors.
    2. ...osmoreceptors.
    3. ...baroreceptors.
    4. ...proprioceptors.
    5. ...joint capsule receptors.

    Author of lecture Sensory Pathways – Sensory Processing (PSY, BIO)

     Tarry Ahuja, MD

    Tarry Ahuja, MD

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