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22 Cards in this Set
- Front
- Back
- 3rd side (hint)
Input from the golgi tendon organ can cause inhibitory post synaptic potentials on
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alpha motor neuron
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innervated by a type 1 anterior horn cell, it will contract
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slowly
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1 (slow contracting) muscle fibers and type 2 (fast contracting)
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The pathological hallmarks of denervation are type grouping and group atrophy disease of an anterior horn cell or its axon results in denervation of a number of muscle fibers
These muscle fibers that have lost their innervation may now be innervated by healthy axons that normally innervate adjacent muscle fibers resulting in an entire group of adjacent muscle fibers becoming atrophic (group atrophy). |
The type of muscle fiber is dependent on the type of
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anterior horn cell that innervates it.
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reticulospinal tracts may
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facilitate or inhibit the activity of the ____________________________ in the anterior gray columns and may, therefore, facilitate or inhibit voluntary movement or reflex activity
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alpha and gamma motor neurons
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tracts may facilitate or inhibit the activity of the alpha and gamma motor neurons in the anterior gray columns and may, therefore, facilitate or inhibit voluntary movement or reflex activity
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reticulospinal tracts
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______________ is visual stimuli. Those fibers that are associated with the sympathetic neurons in the lateral gray column are concerned with the pupillodilation reflex in response to darkness
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tectospinal tract
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tectospinal tract is
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visual stimuli. Those fibers that are associated with the sympathetic neurons in the lateral gray column are concerned with the pupillodilation reflex in response to darkness
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_________ ___________ acts on both the alpha and gamma motor neurons in the anterior gray columns and facilitates the activity of flexor muscles and inhibits the activity of extensor or antigravity muscles.
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rubrospinal tract
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rubrospinal tract
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acts on both the alpha and gamma motor neurons in the anterior gray columns and facilitates the activity of flexor muscles and inhibits the activity of extensor or antigravity muscles.
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vestibulospinal tract by acting on the motor neurons in the
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anterior gray columns, facilitates the activity of the extensor muscles, inhibits the activity of the flexor muscles, and is concerned with the postural activity associated with balance.
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_____________________ by acting on the motor neurons in the anterior gray columns, facilitates the activity of the extensor muscles, inhibits the activity of the flexor muscles, and is concerned with the postural activity associated with balance.
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vestibulospinal tract
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olivospinal tract may play a role in
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muscular activity, but there is doubt that it exists.
The descending autonomic fibers are concerned with the control of visceral activity. |
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________ _________ may play a role in muscular activity, but there is doubt that it exists.
The descending autonomic fibers are concerned with the control of visceral activity. |
olivospinal tract
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corticospinal tracts
pathways concerned with |
voluntary,
discrete, skilled movements, especially those of the = |
distal parts of the limbs.
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Corticospinal tract
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cerebral cortex down to the spinal cord.
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Corticospinal tract
actually consists of ___ separate tracts in the spinal cord: -lateral corticospinal tract and the anterior corticospinal tract. Contains mostly = |
two motor axons.
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Corticospinal tract
actually consists of two separate tracts in the spinal cord: the _______________ & _______________ Contains mostly motor axons. |
lateral corticospinal tract
anterior corticospinal tract. |
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Corticospinal tract
Referred to as a |
pyramidal tract as
when the tract passes the ______ it forms a = |
medulla
dense bundle of nerve fibres that is shaped somewhat like a pyramid |
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Visualize the following areas
-Premotor cortex -supplementary motor cortex -posterior parietal cortex -primary motor cortex |
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