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Questions and Answers
What is the primary function of ascending pathways?
What is the primary function of ascending pathways?
- To relay sensory information (correct)
- To carry motor commands
- To inhibit sensory processing
- To facilitate reflex actions
In the somatic sensory pathways, what term is used to describe the series of neurons involved?
In the somatic sensory pathways, what term is used to describe the series of neurons involved?
- Conduction line
- Neurotransmitter line
- Labeled line (correct)
- Pathway line
Which of the following accurately describes the decussation of pathways?
Which of the following accurately describes the decussation of pathways?
- It is a type of sensory information processing
- It denotes the cross-over of pathways to the opposite side of the brain (correct)
- It describes the reduction of sensory signals
- It refers to the pathways that do not cross over
Which statement about the anterior spinothalamic tract is true?
Which statement about the anterior spinothalamic tract is true?
What characterizes an ipsilateral pathway?
What characterizes an ipsilateral pathway?
What is the primary role of motor pathways?
What is the primary role of motor pathways?
Which order neuron in the somatic sensory pathways runs from the thalamus to the sensory cortex?
Which order neuron in the somatic sensory pathways runs from the thalamus to the sensory cortex?
What does contralateral mean in the context of sensory pathways?
What does contralateral mean in the context of sensory pathways?
What type of sensations does the anterior spinothalamic tract primarily transmit?
What type of sensations does the anterior spinothalamic tract primarily transmit?
What does the term 'labeled line' refer to in the context of somatic sensory pathways?
What does the term 'labeled line' refer to in the context of somatic sensory pathways?
Flashcards
Sensory Pathways
Sensory Pathways
Ascending pathways that carry sensory information to the brain.
Decussation
Decussation
The crossing over of pathways to the opposite side of the brain.
Somatic Sensory Pathways
Somatic Sensory Pathways
Series of neurons carrying sensory information from body to brain.
Anterior Spinothalamic Tract
Anterior Spinothalamic Tract
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Contralateral
Contralateral
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Motor Pathways
Motor Pathways
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Ipsilateral Pathway
Ipsilateral Pathway
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Contralateral Pathway
Contralateral Pathway
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1st Order Neuron
1st Order Neuron
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What does 'labeled line' mean?
What does 'labeled line' mean?
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Study Notes
Sensory and Motor Pathways
- Sensory pathways: Ascending pathways carry sensory information.
- Motor pathways: Descending pathways carry motor commands.
- Decussation: Pathways cross over to the other side of the brain.
- Ipsilateral: pathway does not cross over.
- Contralateral: pathway crosses over.
- Somatic sensory pathways: Series of neurons called the labeled line.
- 1st order neuron: receptor to brainstem or spinal cord.
- 2nd order neuron: brainstem or spinal cord to thalamus.
- 3rd order neuron: thalamus to sensory cortex.
- Neurons collectively known as a labeled line, usually named for their origin or termination.
Sensory Pathways (Conscious Awareness)
- Conscious awareness: Sensations we are consciously aware of.
- Anterior spinothalamic tract: Carries information about crude touch, pressure, itch, and tickle.
- Contralateral destination: cerebral cortex.
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Description
Explore the key concepts of sensory and motor pathways in the nervous system. Understand the differences between ascending and descending pathways, and learn about the decussation and the labeling of somatic sensory pathways. This quiz will test your knowledge on the conscious awareness of sensory pathways.
