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Spontaneous Activity and Responses to Sensory Stimulation in Ventrobasal Thalamic Neurons in the Rat: An In Vivo Intracellular Recording and Staining Study
| Content Provider | Scilit |
|---|---|
| Author | Núñez, Angel Barrenechea, Carmen Avendaño, Carlos |
| Copyright Year | 1994 |
| Description | Spontaneous activity and responses to sensory stimulation in ventrobasal (VB) thalamic neurons were studied in barbiturate-anesthetized rats through intracellular recordings. The recordings were carried out with micropipettes filled with K acetate, KCl plus horseradish peroxidase (HRP), our KCl plus biocytin. Two types of spontaneous depolarizing events were observed: fast potentials (FPs), characterized by a low amplitude (5.3 ± 1.8 mV [mean and standard deviation]), a fast rising slope (1.15 ± 0.19 msec), and a short duration (8.47 ± 0.89 msec); and slow potentials (SPs), characterized by a larger and more variable amplitude (9.1 ± 5.6 mV) and a longer duration (62.5 ± 27.2 msec), with a slower rising slope (26.2 ± 6.4 msec). The potential changes elicited by sensory stimuli delivered manually were similar to those elicited by electronically gated short air jets to the receptive fields. FPs were evoked by sensory stimulation in 62.7% of the recorded neurons, and SPs in the remaining 37.3%. Both types of events could occur spontaneously in the same neuron, but only one of them was triggered by stimulation of the receptive field. Five neurons that were successfully stained with either HRP or biocytin were studied in detail. AH were medium-sized stellate cells, with spine-like appendages sparsely distributed along slender radiating dendrites. The axons took a rostrolateral course across the VB, and all but one left one or two thin collaterals in the reticular thalamic nucleus. No overt morphological differences were observed between VB neurons that responded with FPS or SPs to sensory stimulation. |
| Related Links | http://www.tandfonline.com/doi/pdf/10.3109/08990229409028861 |
| Ending Page | 98 |
| Page Count | 10 |
| Starting Page | 89 |
| ISSN | 08990220 |
| e-ISSN | 13691651 |
| DOI | 10.3109/08990229409028861 |
| Journal | Somatosensory & motor research |
| Issue Number | 1 |
| Volume Number | 11 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 1994-01-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Somatosensory & Motor Research Neurosciences Rat Stimulation Staining Spontaneous Intracellular Thalamic Ventrobasal Responses To Sensory Activity and Responses |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Sensory Systems |
