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Nerve Tissue: Sensory and Motor Pathways in the Spinal Cord

by Geoffrey Meyer, PhD
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    In this lecture, I am going to describe the sensory and motor pathways in the spinal cord. At the end of this lecture, I want you to be able to describe both the motor pathways and the sensory pathways, so you have a very good understanding of these pathways. I also would like you to know the difference between the various ganglia in the body and be able to tell the difference histologically, when you see images of the structures. Well, let's just make sure that we are aware of the autonomic nervous system again before we then try to put all these together and try to describe the structure of the spinal cord in more detail and show the pathways of all the sensory and motor neurons, somatic motor and also visceral motor neurons. Well, just to recall that there are a number of functional divisions of the autonomic nervous system. There is the efferent innervation to smooth muscle, we're unaware of. Efferent innervation means it is exiting the spinal cord or the brain. They are visceral motor neurons, they are causing contraction of smooth muscle, components of cardiac muscle and also the contraction of muscle around glands to increase or decrease secretion. They are going to be divided into two components, the sympathetic components and the parasympathetic components. And as I mentioned earlier, they have opposite effects, but it is worth remembering also that when we see these neurons travelling to their destinations, they are also accompanied by sensory neurons that are taking information back from the viscera. Now, it is important also to understand that when I describe the ventral horn neuron, that was stimulated by that pyramidal cell very early on the lecture, that ventral horn cell was only the one cell needed to innervate skeletal...

    About the Lecture

    The lecture Nerve Tissue: Sensory and Motor Pathways in the Spinal Cord by Geoffrey Meyer, PhD is from the course Nerve Tissue. It contains the following chapters:

    • Nervous system: Sensory and motor pathways in the spinal cord
    • The arrangement and locations of motor and sensory neurons
    • Dorsal root ganglion
    • Autonomic nervous system
    • An autonomic ganglion
    • An enteric ganglion

    Included Quiz Questions

    1. dorsal root into the dorsal horn of the spinal cord.
    2. ventral root into the ventral horn of the spinal cord.
    3. ventral root into the dorsal horn of the spinal cord.
    4. dorsal horn into the dorsal root of the spinal cord.
    5. dorsal root into the ventral horn of the spinal cord.
    1. thoracic and lumbar segments of the spinal cord
    2. paravertebral ganglia
    3. prevertebral ganglia
    4. cranial and sacral segments of the spinal cord
    5. ganglia in peripheral organs
    1. paravertebral ganglia and prevertebral ganglia
    2. lumbar segments of the spinal cord
    3. thoracic segments of the spinal cord
    4. ganglia in peripheral organs
    5. cranial and sacral segments of the spinal cord

    Author of lecture Nerve Tissue: Sensory and Motor Pathways in the Spinal Cord

     Geoffrey Meyer, PhD

    Geoffrey Meyer, PhD


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