Lectures

Thalamus

by Craig Canby, PhD
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      Slides 16 Diencephalon BrainAndNervousSystem.pdf
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    Next, I want you to understand a very important functional aspect of the thalamus. The thalamus is a very important relay center for sensory information. All sensory information is relayed through thalamic connections up then to the cerebral cortex with the exception of olfaction. This slide is simpler in that it’s not overwhelmed with labels. But it is demonstrating the thalamic radiations so these would be the connections that exist between the thalamic nuclei and the cerebral cortex. Thalamic fibers are shown in through here, these darker-colored structures. This is a more anterior view of those thalamic radiations. This is a more posterior view of thalamic radiations. The thalamic radiations travel in the internal capsule. So they do accompany the motor axon fibers that are descending within the internal capsule. The motor fibers are shown here in the lighter color descending through the internal capsule. The thalamus may be considered the gate to consciousness. Here, we see the oval thalamic nuclei. These are bilateral. Each one of these bilateral structures contains multiple nuclear components that make this a very complex structure. Then here in the axial view, we can see various thalamic nuclei and their relationships to one another. I don’t mean to overwhelm you at the beginning here but the purpose of this slide is just to provide you a menu of the various thalamic nuclei. We are going to take a look at each one of these in greater detail, so I’m not going to read all these off to you at this moment. But let’s now take a look at the anterior thalamic nucleus. The anterior thalamic nucleus is shown in through here and has been highlighted for you. When we think about thalamic nuclei, in this case the anterior one, we need to think about input,...

    About the Lecture

    The lecture Thalamus by Craig Canby, PhD is from the course Diencephalon. It contains the following chapters:

    • Thalamus
    • The Reticular Activating System

    Included Quiz Questions

    1. Lateral Geniculate Body LGB
    2. Pulvinar
    3. Medial Geniculate Body MGB
    4. Ventral posterolateral VPL
    5. Mediodorsal
    1. Mediodorsal nucleus
    2. Anterior nucleus
    3. Midline nucleus
    4. Ventral posteromedial (VPM)
    5. Ventral posterolateral (VPL)
    1. Ventral posterolateral nucleus
    2. Anterior nucleus
    3. Midline nucleus
    4. Ventral posteromedial nucleus
    5. Mediodorsal nucleus
    1. Olfactory
    2. Visual
    3. Gustatory
    4. Auditory
    5. Two point discrimination
    1. Pulvinar
    2. Anterior
    3. Ventral posteromedial VPM
    4. Ventral posterolateral VPL
    5. Mediodorsal

    Author of lecture Thalamus

     Craig Canby, PhD

    Craig Canby, PhD


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