Term
| receptive field of a cell |
|
Definition
| the reigon where stimulation modifies the discharge of the cell |
|
|
Term
| two-point discrimination threshold |
|
Definition
| how close two stimuli can be together and not be mistaken for a single stimulus....dependent on receptive field size and receptor density |
|
|
Term
|
Definition
| a method of increasing spatial resolution and two point discriminatino where interneurons inhibit the response of select neurons to make the troughs and peaks more distinct |
|
|
Term
|
Definition
| idea that diferent aspects of sensory input are processed by specialized channels of neurons |
|
|
Term
|
Definition
| the idea that sensory input is spread over a large number of the same type of neuron receptors (often combined with parallel processing) |
|
|
Term
|
Definition
| largest mechanoreceptor, deep in the dermis, fast adapting, onion skin wrappings, sensitive to vibrations 200-300 Hz |
|
|
Term
|
Definition
| slightly smaller than Pacinian corpuscles, hairy and glaborous skin, slow adapting |
|
|
Term
|
Definition
| small, ridges of glaborous skin, fast adapting, sensitive to vibrations around 50 Hz |
|
|
Term
|
Definition
| nerve terminal and flattened non-neural epithelial cell, small, slow adapting |
|
|
Term
|
Definition
| largest, fastest, proprioception of skeletal muscle |
|
|
Term
|
Definition
| medium large, medium fast, mechanoreceptors of skin |
|
|
Term
|
Definition
| smallest myelenated axons, pain temperature |
|
|
Term
|
Definition
| unmyelenated, pain, temperature |
|
|
Term
|
Definition
| area of skin innervatrd by right and left dorsal roots of a single spinal segment. they usually overlap, which is why if you cut one dorsal root you don't lose sensation in a dermatome. you'd have to cut like 3 |
|
|
Term
| Dorsal Column-Medial Lemniscal Pathway |
|
Definition
| touch pathway: axons -> dorsal column of spinal cord -> synapse in dorsal column nuclei -> decussate in medulla -> synapse in thalamus (VP nucleus) -> S1 cortex |
|
|
Term
|
Definition
|
|
Term
| Primary somatosensory cortex |
|
Definition
| Broadmann's areas 3a, 3b, 1, 2 (counting from central sulcus back) |
|
|
Term
| posterior parietal cortex |
|
Definition
| Broadmann's areas 5 and 7 |
|
|
Term
|
Definition
| Merzenich experiments: remove monkey finger, cortical map of other fingers expands to take over the area previously devoted to that finger |
|
|
Term
|
Definition
| inability to recognize objects |
|
|
