"Seeing" With Nonvisual Senses: Mechano- and Electrosensory Systems of Fish

Physiology ◽  
1991 ◽  
Vol 6 (2) ◽  
pp. 73-77 ◽  
Author(s):  
JC Montgomery
Keyword(s):  
Object Detection ◽  
Sensory Processing ◽  
Lateral Line ◽  
Noise Suppression ◽  
Sensory Modality ◽  
Low Light ◽  
Insight Into

In low-light environments the lateral line and electrosensory systems of fishes can replace vision as the major sensory modality. These systems provide insight into sensory processing for orientation, object detection, and noise suppression.

scholarly journals Enhanced pre-ictal cortical responsivity in migraine patients assessed by visual chirp stimulation

Cephalalgia ◽  
2020 ◽  
Vol 40 (9) ◽  
pp. 913-923 ◽  
Author(s):  
Matthijs JL Perenboom ◽  
Mark van de Ruit ◽  
Ronald Zielman ◽  
Arn MJM van den Maagdenberg ◽  
Michel D Ferrari ◽  
...  
Keyword(s):  
Migraine With Aura ◽  
Sensory Processing ◽  
Brain Network ◽  
Dynamic Features ◽  
Beta Band ◽  
Reliable Technique ◽  
Headache Onset ◽  
Interictal State ◽  
Insight Into ◽  
40 Hz

Background Migraine is associated with altered sensory processing and cortical responsivity that may contribute to susceptibility to attacks by changing brain network excitability dynamics. To gain better insight into cortical responsivity changes in migraine we subjected patients to a short series of light inputs over a broad frequency range (“chirp” stimulation), designed to uncover dynamic features of visual cortex responsivity. Methods EEG responses to visual chirp stimulation (10–40 Hz) were measured in controls (n = 24) and patients with migraine with aura (n = 19) or migraine without aura (n = 20). Average EEG responses were assessed at (i) all EEG frequencies between 5 and 125 Hz, (ii) stimulation frequencies, and (iii) harmonic frequencies. We compared average responses in a low (10–18 Hz), medium (19–26 Hz) and high (27–40 Hz) frequency band. Results Responses to chirp stimulation were similar in controls and migraine subtypes. Eight measurements (n = 3 migraine with aura; n = 5 without aura) were assigned as “pre-ictal”, based on reported headache within 48 hours after investigation. Pre-ictally, an increased harmonic response to 22–32 Hz stimulation (beta band) was observed ( p = 0.001), compared to interictal state measurements. Conclusions We found chirp responses to be enhanced in the 48 hours prior to migraine headache onset. Visual chirp stimulation proved a simple and reliable technique with potential to detect changes in cortical responsivity associated with the onset of migraine attacks.

Mode filter: a new noise suppression method for low light level image

1994 ◽  
Author(s):  
Lianfa Bai ◽  
Baomin Zhang ◽  
Qian Chen ◽  
Yinghui Li
Keyword(s):  
Noise Suppression ◽  
Light Level ◽  
Low Light ◽  
Suppression Method

scholarly journals Multimodal sensory integration in the strike–feeding behaviour of predatory fishes

2000 ◽  
Vol 355 (1401) ◽  
pp. 1321-1324 ◽  
Author(s):  
John G. New ◽  
Peter Y. Kang
Keyword(s):  
Lateral Line ◽  
Sensory Integration ◽  
Feeding Behaviour ◽  
Micropterus Salmoides ◽  
Free Field ◽  
Sensory Modality ◽  
Sensory System ◽  
Model Systems ◽  
Relative Role ◽  
Sensory Processes

The search for useful model systems for the study of sensory processing in vertebrate nervous systems has resulted in many neuroethological studies investigating the roles played by a single sensory modality in a given behaviour. However, behaviours relying solely upon information from one sensory modality are relatively rare. Animals behaving in a complex, three–dimensional environment receive a large amount of information from external and internal receptor arrays. Clearly, the integration of sensory afference arising from different modalities into a coherent ‘gestalt’ of the world is essential to the behaviours of most animals. In the last several years our laboratory team has examined the roles played by the visual and lateral line sensory systems in organizing the feeding behaviour of two species of predatory teleost fishes, the largemouth bass, Micropterus salmoides , and the muskellunge, Esox masquinongy . The free–field feeding behaviours of these fishes were studied quantitatively in intact animals and compared to animals in which the lateral line and visual systems had been selectively suppressed. All groups of animals continued to feed successfully, but significant differences were observed between each experimental group, providing strong clues as to the relative role played by each sensory system in the organization of the behaviour. Furthermore, significant differences exist between the two species. The differences in behaviour resulting when an animal is deprived of a given sensory modality reflect the nature of central integrative sensory processes, and these behavioural studies provide a foundation for further neuroanatomical and physiological studies of sensory integration in the vertebrate central nervous system.

scholarly journals Noise Suppression and Contrast Enhancement via Bayesian Residual Transform (BRT) in Low-Light Conditions

2016 ◽  
Vol 2 (1) ◽  
Author(s):  
Audrey G. Chung ◽  
Alexander Wong
Keyword(s):  
Contrast Enhancement ◽  
Image Enhancement ◽  
Noise Suppression ◽  
State Of The Art ◽  
Light Conditions ◽  
Low Light ◽  
Preliminary Results ◽  
Denoised Image

Very low-light conditions are problematic for current robotic visionalgorithms as captured images are subject to high levels of ISOnoise. We propose a Bayesian Residual Transform (BRT) model forjoint noise suppression and image enhancement for images capturedunder these low-light conditions via a Bayesian-based multiscaleimage decomposition. The BRT models a given image as thesum of residual images, and the denoised image is reconstructedusing a weighted summation of these residual images. We evaluatethe efficacy of the proposed BRT model using the VIP-LowLightdataset, and preliminary results show a notable visual improvementover state-of-the-art denoising methods.

scholarly journals Sensory processing disorders in premature infants

Praxis medica ◽  
2021 ◽  
Vol 50 (1-2) ◽  
pp. 19-23
Author(s):  
Jelena Todorović ◽  
Mirjana Petrović-Lazić
Keyword(s):  
Preterm Infants ◽  
Premature Infants ◽  
Sensory Processing ◽  
Relevant Literature ◽  
Sensory System ◽  
Neonatal Unit ◽  
Increased Risk ◽  
Sensory Processing Disorders ◽  
The Impact ◽  
Insight Into

Introduction. Children born prematurely have an increased risk of immediate medical complications, as well as socioemotional, cognitive, linguistic and sensory processing disorders later in life. Studies have examined the effects of prematurity on developmental outcomes, such as cognition, however, there is a need for a more detailed examination of sensory processing disorders in preterm infants. Not only is prenatal neurosensory development interrupted in utero, but these children may also experience intense stimulation in the neonatal unit, which can further alter the development and function of the sensory system. Objective. The paper presents an overview of research on sensory processing disorders in premature infants, with special emphasis on the impact of the environment of the neonatal unit. Method. Insight into the relevant literature was performed by specialized search engines on the Internet and insight into the electronic database. Results. Sensory processing disorders affect 39% to 52% of newborns born prematurely, with some evidence to suggest that children born before 32 weeks are most at risk. The literature to date has consistently reported difficulties in sensory modulation of preterm infants, within the tactile, vestibular, auditory, oral, and visual domains. Conclusion. Sensory processing disorders in preterm infants appear to occur as a result of their immature neurological and biological system and being in the environment of a neonatal intensive care unit, which is unable to meet the sensory needs of preterm infants. Altered sensory experiences, during periods of neurodevelopmental vulnerability and fragility, can result in sensory processing disorders, which may include enhanced responses or less response to stimuli (hyper or hyposensitivity).

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