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| Question | Answer |
| When touched, what happens at the mechanoreceptors? | - membrane is stretched - ion channels open - Na+ influx (or other cations) |
| Three ways a mechanoreceptor channel can be opened | 1. 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 |
| On 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 |
| T/F: sensory neurons are unipolar. | F. Bipolar. |
| Location of cell bodies of sensory neurons. | Dorsal root ganglia |
| The two branches of axons of sensory neuron project to _________ and ___________. | 1. periphery (receptor) 2. spinal cord of brain stem (Afferent) |
| Location of cell bodies of sensory receptors for face are in the ______ | trigeminal ganglia |
| Match 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 fibers | 1. 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 |
| The propagation during nerve stimulation is in the sequence of: | Their diameter and myelination. A-alpha --> A-beta --> A-delta --> C |
| Match the type of adaptation pattern to the name of mechanoreceptors. RA1, SA1, RA2, SA2. | RA1: Meissner SA1: Merkel RA2: Pacinian SA2: Ruffini |
| Pathway for mechanoception and pain/temperature are ________ and _______ respectively. | Mechanoception: dorsal column Pain/temp: anterolateral column |
| Match 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 |
| The 'where' pathway is the | ventral stream to medial temporal pathway (ventral posterior superior thalamus to 3a and higher |
| The 'what' pathway is the | dorsal stream to frontal motor area |
| BAs is the _______ cortex. It is directly connected to _______ cortex and provides feedback during functional tasks. | BA2: somatosensory cortex. directly connected to motor cortex |
| T/F: visual feedback allows skillful retrieval. | F. somatosensory is needed. |
| The 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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