Behavioral state dependency of neural activity and sensory (whisker) responses in superior colliculus.

@article{Cohen2010BehavioralSD,
  title={Behavioral state dependency of neural activity and sensory (whisker) responses in superior colliculus.},
  author={Jeremy D Cohen and Manuel A. Castro-Alamancos},
  journal={Journal of neurophysiology},
  year={2010},
  volume={104 3},
  pages={
          1661-72
        }
}
Rats use their vibrissa (whiskers) to explore and navigate the environment. These sensory signals are distributed within the brain stem by the trigeminal complex and are also relayed to the superior colliculus in the midbrain and to the thalamus (and subsequently barrel cortex) in the forebrain. In the intermediate layers of the superior colliculus, whisker-evoked responses are driven by direct inputs from the trigeminal complex (trigeminotectal) and feedback from the barrel cortex… 

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References

SHOWING 1-10 OF 33 REFERENCES
Vibrissa Sensation in Superior Colliculus: Wide-Field Sensitivity and State-Dependent Cortical Feedback
TLDR
Although cells in the intermediate layers of the superior colliculus respond relatively effectively to single whiskers, the cells respond much more robustly to simultaneous, or nearly simultaneous, wide-field (multiwhisker) stimuli.
Detection of Low Salience Whisker Stimuli Requires Synergy of Tectal and Thalamic Sensory Relays
TLDR
It is found that reversible lesions of either the somatosensory thalamus or superior colliculus blocked detection of a low salience whisker conditioned stimulus (WCS) in an active avoidance task, without affecting Detection of a high salience WCS.
Output pathways from the rat superior colliculus mediating approach and avoidance have different sensory properties
TLDR
Electrophysiological study attempted to characterise the sensory properties of antidromically identified cells of origin of these pathways in anaesthetised rats and found that the contralaterally projecting predorsal bundle efferents were primarily somatosensory while the ipsilateral cuneiform projection was primarily visual.
Functional architecture of rodent superior colliculus: relevance of multiple output channels.
Nociceptive neurons in rat superior colliculus: response properties, topography, and functional implications.
TLDR
The temperature sensitivity of thermal-sensitive neurons in the superior colliculus appeared to be tuned to detect large deviations from ambient skin temperature in either direction once threshold is reached, which seems particularly adaptive in view of the fact that rodents use their vibrissae for exploring their environment and thus put rostral body parts at risk during such behaviors.
Early Sensory Pathways for Detection of Fearful Conditioned Stimuli: Tectal and Thalamic Relays
TLDR
During pavlovian fear conditioning, which is a situation in which the aversive outcome is not contingent on the behavior of the animal, the sensory thalamus is a critical relay for the detection of the CS.
Translation of sensory signals into commands for control of saccadic eye movements: role of primate superior colliculus.
TLDR
New and/or improved models of the role of the SC in sensorimotor integration are needed as guides for future research and it may be fruitful to examine the function of theSC from a motor perspective.
Changes in sensory responsivity in deep layer neurons of the superior colliculus of behaving rats
Eye movements evoked by electrical stimulation in the superior colliculus of rats and hamsters
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