Md2 Block2 Ns Spinal Cord 3 Decending Tracts Part B

Front 1

Input from the golgi tendon organ can cause inhibitory post synaptic potentials on

Back 1

alpha motor neuron

Front 2

innervated by a type 1 anterior horn cell, it will contract

Back 2

slowly

Hint 2

1 (slow contracting) muscle fibers and type 2 (fast contracting)

Front 3

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).

Back 3

The type of muscle fiber is dependent on the type of

Hint 3

anterior horn cell that innervates it. 

Front 4

reticulospinal tracts may

Back 4

facilitate or inhibit the activity of the ____________________________ in the anterior gray columns and may, therefore, facilitate or inhibit voluntary movement or reflex activity

Hint 4

alpha and gamma motor neurons

Front 5

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

Back 5

reticulospinal tracts

Hint 5

Front 6

______________ 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

Back 6

tectospinal tract

Hint 6

Front 7

tectospinal tract is

Back 7

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

Hint 7

Front 8

_________ ___________ 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.

Back 8

rubrospinal tract

Hint 8

Front 9

rubrospinal tract

Back 9

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.

Hint 9

Front 10

vestibulospinal tract by acting on the motor neurons in the

Back 10

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.

Hint 10

Front 11

_____________________ 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.

Back 11

vestibulospinal tract

Hint 11

Front 12

olivospinal tract may play a role in

Back 12

muscular activity, but there is doubt that it exists.
The descending autonomic fibers are concerned with the control of visceral activity.

Hint 12

Front 13

________ _________ 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.

Back 13

olivospinal tract

Hint 13

Front 14

corticospinal tracts
pathways concerned with

Back 14

voluntary,
discrete,
skilled movements,

especially those of the =

Hint 14

distal parts of the limbs.

Front 15

Corticospinal tract

Back 15

cerebral cortex down to the spinal cord.

Front 16

Corticospinal tract

actually consists of ___ separate tracts in the spinal cord:

-lateral corticospinal tract and the anterior corticospinal tract. Contains mostly =

Back 16

two motor axons.

Front 17

Corticospinal tract

actually consists of two separate tracts in the spinal cord: the _______________
&
_______________
Contains mostly motor axons.

Back 17

lateral corticospinal tract

anterior corticospinal tract.

Front 18

Corticospinal tract
Referred to as a

Back 18

pyramidal tract as

when the tract passes the ______ it forms a =

Hint 18

medulla

dense bundle of nerve fibres that is shaped somewhat like a pyramid

Front 19

Visualize the following areas

-Premotor cortex
-supplementary motor cortex
-posterior parietal cortex
-primary motor cortex

Back 19

Front 20

Back 20

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Front 21

Back 21

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Front 22

Back 22

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