Lecture 29: Somatic System / Reflex Arc Flashcards Preview

HUBS 191💃✨ > Lecture 29: Somatic System / Reflex Arc > Flashcards

Flashcards in Lecture 29: Somatic System / Reflex Arc Deck (10):
1

Reflex Movements are generated in the....

- Spinal cord

2

The reflex arc consists of...

- Stimulus
- Receptor
- Afferent Neuron
- Interneuron (CNS)
- Efferent neuron
- Effector
- Response

3

What is a reflex?

- A predictable response

4

The withdrawal reflex...

- We only really realise we've hurt ourselves after removing the painful stimulus
- Before the signal reaches the brain

5

What is the corticospinal (pyramidal) pathway?

- Upper motor neuron
- Crosses over at medulla
- Lower motor neuron
- Controls precise movement of hands and feet

6

What are the non-corticospinal pathway?

- End up on to the final common pathway
- Involved in regulation of posture
- E.g. walking, chewing, smiling

7

Integration between motor and sensory systems occur in the...How does this happen?

- Basal ganglia
- They modify movement using a 'loop' system with the cortex
- The cerebellum ('little brain') is also involved
- Ensures the selected movement is coordinated, and guided by sensory feedback

8

Procedural memory...

- Development of automatic movements / motor programmes

9

The basal ganglia is a collection...

- Of cell bodies below cortex

10

Cerebral cortex integration...

- Basal ganglia
- Thalamus
- Cerebellum
- Brainstem
- Spinal cord
- Interneurons
- Anterior horn motor neurons
- Somatic effectors (skeletal muscle)

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