BIOL 223 Chapter 15-3
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List the four elements of the sensory pathway.
- spinal cord/brainstem
- primary somatosensory cortex
What type of neurons go between the receptors and the spinal cord/brainstem?
1st order neurons
What type of neurons go between the brainstem/spinal cord and the thalamus?
2nd order neurons
What type of neurons go between the thalamus and the sensory cortexes?
3rd order neurons
List the two subdivisions of the posterior sensory pathway.
- fasciculus gracilis
- fasciculus cuneatus
List the two subdivisions of the spinocerebellar tract.
- anterior spinocerebellar tract
- posterior spinocerebellar tract
List the two subdivisionos of the spinothalamic tract.
- anterior spinothalamic tract
- lateral spinothalamic tract
Sensation from the left and right sides of the body regarding fine touch, pressure, proprioception, and vibration will travel through the:
Proprioceptor information that we are not aware of will travel through the:
Information regarding the upper trunk and arms that does not cross over will travel through the:
posterior spinocerebellar pathway
Information regarding the lower trunk and legs that does cross over will travel through the:
anterior spinocerebellar pathway
Crude touch, pressure, tickle, and itch will travel through the _______ spinothalamic pathway.
Pain and temperature will travel through the _______ spinothalamic pathway.
True or False: Information that travels through the somatic sensory pathways will usually "cross over" on the journey so that information from the right side of the body goes to the left side of the brain.
Neurons that travel from the primary motor cortex to the somatic motor nuclei of the brain stem or spinal cord are the:
upper motor neurons
Neurons that travel to skeletal muscle are known as:
lower motor neurons
List the three subdivisions of the corticospinal pathway.
- cortibulbar pathway
- anterior corticospinal tract
- lateral corticospinal tract
Movements of the head and face travel through the:
Movements of the neck, trunk, and proximal portions of the limbs will travel through the:
lateral corticospinal tract
Movements of the distal portions of the limbs will travel through the:
anterior corticospinal tract
What was the specific tract discussed as part of the lateral pathway?
The movements of the hands and fingers and connection to the red nucleus are handled by the _______ tract.
List three subdivisions of the medial pathway discussed in class.
- tectospinal tract
- vestibulospinal tract
- reticulospinal tract
Reflex movements of the neck and head in response to visual and auditory stimuli travel through the:
tectospinal tract of the medial pathway
The tectospinal tract is associated with which brain structures?
superior and inferior colliculi
The vestibulospinal tract helps to maintain:
posture and balance
This tract of the medial pathway helps with posture adustment.
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