Exam (elaborations)
SPLH 620 Exam #3.
- Course
- Institution
Exam of 13 pages for the course SPLH 620- EXAM #2 at SPLH 620- EXAM #2 (SPLH 620 Exam #3.)
[Show more]
Seller
Follow
denicetho
Content preview
SPLH 620 Exam #3motor cortex - ANS-controls voluntary movements
primary motor cortex - ANS--receives sensory input from the cerebellum via. thalamus
-sends info. to the spinal cord & brainstem
-sends info to corticospinal or corticobulbar tract
premotor cortex - ANS-The region controlling learned motor skills.
-receives input from posterior parietal & visual cortexes
lesions in premotor cortex - ANS-cause an inability to perform purposeful coordinated
actions without a presence of weakness
supplementary motor cortex - ANS-programming of complex movements
-most output goes through M1 (primary motor cortex)
-receives input from association areas of parietal & temporal cortex's
pyramidal system - ANS-the system responsible for controlling voluntary motor
movements (fine controlled, skilled, rapid, etc.)
extrapyramidal system - ANS-controls the postural support for fine motor movement
(involuntary)
-source of input to LMS's via multiple synapses
-smaller, short, "local" circuits
corticospinal tract - ANS-cerebral cortex to the spinal cord
UMN of corticospinal tract... - ANS--"first" order neurons
-cerebral cortex to spinal cord
-descend through internal capsule
-decussate @ medulla (brainstem)
-synapse in anterior horn of the spinal cord
LMN of corticospinal tract - ANS--"second" order neurons
-cell body of anterior horn synapses with muscle fibers = motor unit
, corticobulbar tract - ANS-Controls all voluntary movement for speech production.
Descends from motor cortex through internal capsule but terminates at cranial nerves.
-cerebral cortex to brainstem
UMN of corticobulbar tract - ANS--"first" order neurons
-cerebral cortex ---> brainstem
-descend down through the internal capsule
-synapse on cranial nerve nuclei (CN nuclei)
LMN of corticobulbar tract - ANS--"second" order neurons
-cell body in CN nuclei synapse with muscle fibers = motor unit
pyramidal system includes: - ANS--motor cortical areas -primary motor cortex, premotor
cortex, supplementary motor cortex
-corticospinal tract
-corticobulbar tract
extrapyramidal system includes: - ANS--basal ganglia
-cerebellum
-brainstem
Brainstem functions as a motor conduit for: - ANS--corticospinal tract
brainstem integrates info... - ANS--reticular formation
-complex motor patterns, aspects of respiratory & cardiovascular activity,
consciousness, etc.
reticular formation (RF) - ANS-a network within the medulla and brainstem; associated
with attention, alertness, and some reflexes
-modulates transmission of info. in pain pathways
-autonomic reflex circuity: breathing, heart rate, blood pressure, etc.
-control of arousal & consciousness
central pattern generators - ANS-circuits of neurons that generate routine, rhythmic
movements and are controlled entirely by the spine with no input from the brain
-locomotion
-respiration
-swallowing
dorsal root = - ANS-sensory
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller denicetho. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.35. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75759 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now