Flashcards
Module 2 Lecture 5 SOmatosensory System
Cards in this deck (17)
- 1When touched, what happens at the mechanoreceptors?- membrane is stretched
- ion channels open
- Na+ influx (or other cations) - 2Three ways a mechanoreceptor channel can be opened1. direct stretch (force conveyed to lipid tension)
2. force conveyed through structural protein linked to the ion channel
3. separate protein acts as force sensor and internal second messengers are involved - 3On muscle spindles, force is extended to open channels through a network of _________ when stretch is applied to ______.Network of cytoskeletal strands.
when stretch is applied to intrafusal fiber - 4T/F: sensory neurons are unipolar.F. Bipolar.
- 5Location of cell bodies of sensory neurons.Dorsal root ganglia
- 6The two branches of axons of sensory neuron project to _________ and ___________.1. periphery (receptor)
2. spinal cord of brain stem (Afferent) - 7Location of cell bodies of sensory receptors for face are in the ______trigeminal ganglia
- 8Match the name of mechanoreceptors to their respective fiber types. 1. muscle spindle 2. Golgi tendon organ 4. mechanoreceptors in skin 5. fast pain fibers 6. slow pain fibers1. muscle spindle: Ia, II
2. Golgi tendon organ: Ib
4. mechanoreceptors in skin: A-beta
5. fast pain fibers: A-delta
6. slow pain fibers: C fibers - 9The propagation during nerve stimulation is in the sequence of:Their diameter and myelination.
A-alpha --> A-beta --> A-delta --> C - 10Match the type of adaptation pattern to the name of mechanoreceptors. RA1, SA1, RA2, SA2.RA1: Meissner
SA1: Merkel
RA2: Pacinian
SA2: Ruffini - 11Pathway for mechanoception and pain/temperature are ________ and _______ respectively.Mechanoception: dorsal column
Pain/temp: anterolateral column - 12Match the cortical representation of each type of fibers. 3a: 3b: 1: 2: 5:3a: muscle spindles (Ia)
3b: SA1, RA1 (Merkle and Meissner)
1: RA1, RA2 (Meisnner and Pacinian)
2: complex touch, proprioception
5: active touch - 13The 'where' pathway is theventral stream to medial temporal pathway (ventral posterior superior thalamus to 3a and higher
- 14The 'what' pathway is thedorsal stream to frontal motor area
- 15BAs is the _______ cortex. It is directly connected to _______ cortex and provides feedback during functional tasks.BA2: somatosensory cortex.
directly connected to motor cortex - 16T/F: visual feedback allows skillful retrieval.F. somatosensory is needed.
- 17The rubber hand illusion demonstrate that the sense of body arises in ________ from congruent ____ and _____ information.premotor cortex.
visual and somatosensory information.
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- PT569 Fundamentals of Neuroscience Flashcards on Module 2 Lecture 5 SOmatosensory System, created by Mia Li on 28/02/2018.
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- Mia Li · Feb 2018
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- Feb 28, 2018
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