Sensory And Motor Pathways Flashcards

1
Q

Explain motor pathway from upper motor neuron to lower motor neuron

A

UPPER - cell body in motor cortex and axon extends to the brainstem. motor nucleus is in brainstem)
LOWER - cell body in brainstem is associated with the nerve and then innervates muscle fibres

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2
Q

Name the three neurons involved in the sensory pathway

A

Primary neuron, secondary neuron, tertiary neuron

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3
Q

Where does the pathway sensory begin?

A

Behind the central sulcus

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4
Q

What do primary neuron dendrites innovate?

A

End receptor cells

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5
Q

Where is the cell body of the primary neuron?

A

In a ganglion

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6
Q

Where does the axon of the primary neuron synapse?

A

In the sensory nucleus in the brainstem

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7
Q

Where is the cell body of the secondary neuron?

A

Brain stem nucleus associated with the nerve

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8
Q

Where does the axon of the secondary neuron extend?

A

Thalamus (relay station)

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9
Q

Where is the cell body of the tertiary neuron?

A

Thalamus

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10
Q

Where does the axon of the tertiary neuron extend?

A

Primary sensory cortex (usually in the postcentral gurus of the parietal lobe)

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