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Relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro
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| Zeitschriftentitel: | Journal of Neurophysiology |
|---|---|
| Personen und Körperschaften: | , |
| In: | Journal of Neurophysiology, 116, 2016, 3, S. 1137-1151 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Physiological Society
|
| Schlagwörter: |
| author_facet |
Dougherty, Patrick M. Chen, Jinghong Dougherty, Patrick M. Chen, Jinghong |
|---|---|
| author |
Dougherty, Patrick M. Chen, Jinghong |
| spellingShingle |
Dougherty, Patrick M. Chen, Jinghong Journal of Neurophysiology Relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro Physiology General Neuroscience |
| author_sort |
dougherty, patrick m. |
| spelling |
Dougherty, Patrick M. Chen, Jinghong 0022-3077 1522-1598 American Physiological Society Physiology General Neuroscience http://dx.doi.org/10.1152/jn.00187.2016 <jats:p> The input-output and discharge properties of neurons are shaped by both passive and active electrophysiological membrane properties. Whole cell patch-clamp recordings in lamina I–III neurons in an isolated preparation of the whole spinal cord of juvenile rats with attached dorsal roots and dorsal root ganglia were used to further define which of these properties provides the most impactful classification strategy. A total of 95 neurons were recorded in segment L5 and were classified based on the responses to L4 dorsal root stimulation. The results showed that high-threshold and silent neurons had higher membrane resistance and more negative resting membrane potential than low-threshold or wide-dynamic-range neurons. Rheobase in low-threshold and wide-dynamic-range neurons was significantly lower than that of high-threshold or silent neurons. Four types of firing patterns were identified in response to depolarizing current injections. Low-threshold cells most frequently showed a phasic firing pattern characterized by a short initial burst of action potentials, single spiking or irregular firing bursts at the onset of a depolarizing pulse. High-threshold and wide-dynamic-range neurons were characterized by tonic firing with trains of spikes occurring at regular intervals throughout the current pulse. The majority of silent neurons displayed a delayed onset of firing in response to current injection. These results indicate that the passive membrane properties of spinal neurons are tuned to optimize the responses to particular subsets of afferent stimuli. </jats:p> Relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro Journal of Neurophysiology |
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Journal of Neurophysiology |
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| title |
Relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro |
| title_unstemmed |
Relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro |
| title_full |
Relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro |
| title_fullStr |
Relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro |
| title_full_unstemmed |
Relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro |
| title_short |
Relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro |
| title_sort |
relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro |
| topic |
Physiology General Neuroscience |
| url |
http://dx.doi.org/10.1152/jn.00187.2016 |
| publishDate |
2016 |
| physical |
1137-1151 |
| description |
<jats:p> The input-output and discharge properties of neurons are shaped by both passive and active electrophysiological membrane properties. Whole cell patch-clamp recordings in lamina I–III neurons in an isolated preparation of the whole spinal cord of juvenile rats with attached dorsal roots and dorsal root ganglia were used to further define which of these properties provides the most impactful classification strategy. A total of 95 neurons were recorded in segment L5 and were classified based on the responses to L4 dorsal root stimulation. The results showed that high-threshold and silent neurons had higher membrane resistance and more negative resting membrane potential than low-threshold or wide-dynamic-range neurons. Rheobase in low-threshold and wide-dynamic-range neurons was significantly lower than that of high-threshold or silent neurons. Four types of firing patterns were identified in response to depolarizing current injections. Low-threshold cells most frequently showed a phasic firing pattern characterized by a short initial burst of action potentials, single spiking or irregular firing bursts at the onset of a depolarizing pulse. High-threshold and wide-dynamic-range neurons were characterized by tonic firing with trains of spikes occurring at regular intervals throughout the current pulse. The majority of silent neurons displayed a delayed onset of firing in response to current injection. These results indicate that the passive membrane properties of spinal neurons are tuned to optimize the responses to particular subsets of afferent stimuli. </jats:p> |
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| author | Dougherty, Patrick M., Chen, Jinghong |
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| description | <jats:p> The input-output and discharge properties of neurons are shaped by both passive and active electrophysiological membrane properties. Whole cell patch-clamp recordings in lamina I–III neurons in an isolated preparation of the whole spinal cord of juvenile rats with attached dorsal roots and dorsal root ganglia were used to further define which of these properties provides the most impactful classification strategy. A total of 95 neurons were recorded in segment L5 and were classified based on the responses to L4 dorsal root stimulation. The results showed that high-threshold and silent neurons had higher membrane resistance and more negative resting membrane potential than low-threshold or wide-dynamic-range neurons. Rheobase in low-threshold and wide-dynamic-range neurons was significantly lower than that of high-threshold or silent neurons. Four types of firing patterns were identified in response to depolarizing current injections. Low-threshold cells most frequently showed a phasic firing pattern characterized by a short initial burst of action potentials, single spiking or irregular firing bursts at the onset of a depolarizing pulse. High-threshold and wide-dynamic-range neurons were characterized by tonic firing with trains of spikes occurring at regular intervals throughout the current pulse. The majority of silent neurons displayed a delayed onset of firing in response to current injection. These results indicate that the passive membrane properties of spinal neurons are tuned to optimize the responses to particular subsets of afferent stimuli. </jats:p> |
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| spelling | Dougherty, Patrick M. Chen, Jinghong 0022-3077 1522-1598 American Physiological Society Physiology General Neuroscience http://dx.doi.org/10.1152/jn.00187.2016 <jats:p> The input-output and discharge properties of neurons are shaped by both passive and active electrophysiological membrane properties. Whole cell patch-clamp recordings in lamina I–III neurons in an isolated preparation of the whole spinal cord of juvenile rats with attached dorsal roots and dorsal root ganglia were used to further define which of these properties provides the most impactful classification strategy. A total of 95 neurons were recorded in segment L5 and were classified based on the responses to L4 dorsal root stimulation. The results showed that high-threshold and silent neurons had higher membrane resistance and more negative resting membrane potential than low-threshold or wide-dynamic-range neurons. Rheobase in low-threshold and wide-dynamic-range neurons was significantly lower than that of high-threshold or silent neurons. Four types of firing patterns were identified in response to depolarizing current injections. Low-threshold cells most frequently showed a phasic firing pattern characterized by a short initial burst of action potentials, single spiking or irregular firing bursts at the onset of a depolarizing pulse. High-threshold and wide-dynamic-range neurons were characterized by tonic firing with trains of spikes occurring at regular intervals throughout the current pulse. The majority of silent neurons displayed a delayed onset of firing in response to current injection. These results indicate that the passive membrane properties of spinal neurons are tuned to optimize the responses to particular subsets of afferent stimuli. </jats:p> Relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro Journal of Neurophysiology |
| spellingShingle | Dougherty, Patrick M., Chen, Jinghong, Journal of Neurophysiology, Relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro, Physiology, General Neuroscience |
| title | Relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro |
| title_full | Relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro |
| title_fullStr | Relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro |
| title_full_unstemmed | Relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro |
| title_short | Relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro |
| title_sort | relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro |
| title_unstemmed | Relationship of membrane properties, spike burst responses, laminar location, and functional class of dorsal horn neurons recorded in vitro |
| topic | Physiology, General Neuroscience |
| url | http://dx.doi.org/10.1152/jn.00187.2016 |