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NR 603 Week 1 Questions with 100% Correct Answers | Latest Update 2024 | Rated A+ $13.24   Add to cart

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NR 603 Week 1 Questions with 100% Correct Answers | Latest Update 2024 | Rated A+

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NR 603 Week 1 Questions with 100% Correct Answers | Latest Update 2024 | Rated A+

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  • November 4, 2024
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NR 603 Week 1 Questions with 100%
Correct Answers | Latest Update 2024 |
Rated A+


differentiate between the lateral and medial motor systems - ✔✔lateral =

distal //fine motor

- lateral corticospinal tract


- rubrospinal tract




medial = proximal //gross motor


- anterior corticospinal tract


- reticulospinal tract

- tectospinal tract


- vestibulospinal tract

,discuss the lateral corticospinal tract in terms of axons - ✔✔90% axons cross

in pyramidal decussation (medulla)




discuss the anterior //medial corticospinal tract in terms of axons - ✔✔8%

axons cross in spinal cord + 2% axons from lateral corticospinal tract that do

NOT cross in pyramidal decussation (medulla)




innervates everything, but ONLY tract that innervates fine motor movements e.g.

hands




discuss the reticulospinal tract - ✔✔medial motor system




brainstem = automatic responses e.g. postural control




discuss the tectospinal tract - ✔✔medial motor system

, turning eyes/head to orient peripheral




discuss the vestibulospinal tract - ✔✔medial motor system




balance/postural control reactions




define somatotopy - ✔✔point-for-point correspondence of an area of the body

to a specific point on the CNS e.g. motor/sensory cortex homunculus




where does the rubrospinal tract originate? - ✔✔red nucleus in midbrain




where does the rubrospinal tract decussate? - ✔✔ventral tegmental in midbrain




where does the tectospinal tract originate? - ✔✔superior colliculus in midbrain

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