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Sensory Systems
| Prompt | Response |
|---|---|
| Sensory information has four main functions | Collecting this type of information has four main functions 1. Perception of our environment 2. Control of movement 3. Regulation of the function of internal organs 4 Maintenance of arousal |
| Sensations have four common properties | Modality, intensity, duration and location are common properties of ____________. |
| Give three submodalities of somatic sensation | Fine touch, warmth and heat are submodalities of this modality |
| The dorsal column-medial lemniscal pathway starts with _____ and _____ fibers and conveys information on __________ and __________. | This pathway starts with A alpha and A beta fibers and conveys information on fine touch and proprioception |
| The anterolateral pathway starts with _____ and _____ fibers and converys information on _____ and _______. | This pathway starts with A delta and C fibers and conveys information on pain and temperature. |
| Exaplain why a spinal injury affecting only one side might prevent the patient from feeling fine touch on the ipsilateral side yet prevent them from percieving pain on the contralateral side. | A spinal injury affecting only one side might prevent the patient from feeling ________ on the ipsilateral side yet prevent them from percieving __________ on the contralateral side because slide 19 |
| The morphology of primary somatic sensory afferents differs from a typical neuron | The body of this type of cell is located near the middle of it's axon |
| Define sensory transduction | I am the transformation of sensory information from the external or internal environment into action potentials, the language of the nervous system. |
| Sensory transduction is the process of transforming _________ information into the opening and closing of ____________ in _________ cells. | ____________________ is the process of transforming sensory information into the opening and closing of ion channels in receptor cells. |
| The front of the animal is referred to as _______ or anterior whereas the back of the animal is referred to as __________ or posterior. | The _______ of the animal is referred to as rostral or __________ and the ________ of the animal is referred to as caudal or ___________. |
| recepive fields in high-acuity regions of the body are ____________ and ___________ compared to the receptive fields on a similar surface in low-acuity regions such as the torso. | recepive fields in __________ regions of the body are smaller and numerous compared to the receptive fields on a similar surface in ____________ regions such as the torso. |
| Precision refers to the size of receptive fields whereas sensitivity refers to... | Sensitivity refers to the intensity of a stimulus required to activate the ion channels in a receptor cell and trigger an action potential (activation threshold) whereas precision refers to... |
| Define combinatorial processing | I am the activation of multiple receptor types and the integration of multiple parallel labeled lines to create percieved sensations in the brain. |
| Define labeled line | Each submodalty of the somatic sensory modality is mediated by a specific receptor / fiber type which together are referred to as a |
| Pressure on the skin is encoded as the frequency of action potentials in _____________________. | Pressure on the skin is encoded as the _________________ in primary sensory fibers or afferents |
| A alpha and A beta fibers of the dorsal column medial lemniscal pathway project to ____________ whereas A delta and C fibers of the anterolateral pathway project to the anterolateral column of the spinal chord. | A alpha and A beta fibers of the dorsal column medial lemniscal pathway project to the brainstem whereas A delta and C fibers of the anterolateral pathway project to the _____________________________. |
| Sensory receptors act as __________, extracting certain forms of sensory information and ignoring others. | Sensory receptors act as filters, __________certain forms of sensory information and __________others. |
| Merkel cells and ruffini endings respond to _________ stimulus whereas Meissner corpuscle and pacinian corpuscle fire action potentials ______________________ of the stimulus. | __________cells and ___________endings respond to continuous stimulus whereas _________ ________ and __________ ____________ fire action potentials at the beginning and the at end of the stimulus. |
| A alpha and A beta are fast axons, therefore they have a _______ diameter and are well myelinated. They are responsible for __________ and __________. | These axons have a large diameter and are well-myelinated. They are responsible for fine touch and proprioception. |
| A delta and C axons are slower due to their ______ diameter and low or nonexistant myelin. They are responsible for ________ and ___________ sensation. | These axons are slower due to their small diameter and low or nonexistant myelin. They are responsible for pain and temperature sensation. |
Created by:
April2000
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