Somatic- Volntary Skeletal

Question 0

Sns Innervate to/from all

Answer 0

Skeletal muscle

Question 1

Somatic nervous system: voluntary control of skeletal muscle

Answer 1

Provide conscious, voluntary control

Question 2

Sns outgoing dependent upon

Answer 2

Tracts leaving the cortex, traveling down the spinal column and synapsing with new motor neurons before exiting the cns

Question 3

Sns efferent nerves leaving the cns now traveling

Answer 3

As apart of the pns, an synapsing directly with muscle–> causing/firing muscle movement

Question 4

Sns incoming afferent nerves entering the cns coming directly

Answer 4

From skin or muscle ( temp,pressure, pain, texture)

Question 5

Sns incoming nerves synapse with

Answer 5

Other sensory neurons along he way now traveling as part of cns –> providing sensory info form the pns

Question 6

Close laptop lid Brain pathway

Answer 6

Premotor to plan- primary motor- projection fibers (corona radiati/ internal capsule)- basal ganglia to edit- cerebellum to fix once start

Question 7

And reflex arcs provide

Answer 7

Conscious, voluntary Control

Question 8

Reflex arc directly mapped/linked

Answer 8

Sensory-motor system in the pns

Question 9

Reflex arc located

Answer 9

At the level of the spinal nerves involved in the pns

Question 10

Reflex ace bypasses the

Answer 10

Cns altogether and provides for immediate responses to external stimuli

Act in a protective manner to minimize danger

Question 11

Upper motor neurons are all located

Answer 11

In the cns- cell body

Question 12

Axons from UMNs do not leave the cns …

Answer 12

They remain within the brain, brainstem, and/or the spinal cord

Question 13

UMNs originate in the

Answer 13

Premotor cortex of the frontal lobe

Question 14

Axons of the UMN corticospinal tracts and

Answer 14

corticobulbar tracts

Question 15

Corticospinal

Answer 15

Projection fibers traveling vertically

Sending axons to synapse with lower motor neurons in the spinal cord

Question 16

Corticobulbar tracts

Answer 16

Projection fibers traveling vertically

Sending axons to synapse with cranial nerve nuclei in the brainstem

Question 17

UMNs provide for a direct activation system

Answer 17

From cns to pns –> direct link between UMN and LMN doe. In the spinal cord, direct route for voluntary movement

Question 18

UMN referred to as

Answer 18

Direct activation pathway
Direct motor system
Pyramidal tract (because they decussate at the level of a structure referred to as the pyramid in the brainstem

Question 19

Lower motor neurons (cell bodies and axons)

Answer 19

Those neurons which convey the neural impulse to its final destination

Question 20

LMN

Answer 20

Cell body in the cns

Axon extend out of the spinal cord or brainstem and into the periphery which is in the pns

Question 21

LMN fiction to x

Answer 21

Receive incoming UMN message from the motor Cortex
Transmit that incoming motor impulse to the muscle itself
Cause the muscle itself to fire/move/contract

Question 22

LMN entIre system called

Answer 22

The diablo common pathway

Question 23

LMN also called

Answer 23

2nd order neurons, cranial nerve neurons, anterior horn cells, alpha motor neurons

Question 24

Where do efferent tracts cross over

Answer 24

Medulla

Question 25

Signal travel in spinal cord

Answer 25

Travel down ipsalaterally and at medulla cross over and travel contra laterally until reaches LMN