Cortical Response to Auditory Motion Suggests an Asymmetry in the Reliance on Inter-Hemispheric Connections Between the Left and Right Auditory Cortices

2007 ◽  
Vol 97 (2) ◽  
pp. 1649-1655 ◽  
Author(s):  
Katrin Krumbholz ◽  
Nicola Hewson-Stoate ◽  
Marc Schönwiesner
Keyword(s):  
Hemispheric Lateralization ◽  
Spatial Processing ◽  
Auditory Motion ◽  
Motion Onset ◽  
Opposite Hemisphere ◽  
Response Latencies ◽  
Left And Right ◽  
Auditory Cortices ◽  
Onset Response ◽  
To Receive

The aim of the current study was to measure the brain's response to auditory motion using electroencephalography (EEG) to gain insight into the mechanisms by which hemispheric lateralization for auditory spatial processing is established in the human brain. The onset of left- or rightward motion in an otherwise continuous sound was found to elicit a large response, which appeared to arise from higher-level nonprimary auditory areas. This motion onset response was strongly lateralized to the hemisphere contralateral to the direction of motion. The response latencies suggest that the ipsilateral response to the leftward motion was produced by indirect callosal projections from the opposite hemisphere, whereas the ipsilateral response to the rightward motion seemed to receive contributions from direct thalamocortical projections. These results suggest an asymmetry in the reliance on inter-hemispheric projections between the left and right auditory cortices for auditory spatial processing.

scholarly journals Network-based asymmetry of the human auditory system

2018 ◽  
Author(s):  
Bratislav Mišić ◽  
Richard F. Betzel ◽  
Alessandra Griffa ◽  
Marcel A. de Reus ◽  
Ye He ◽  
...  
Keyword(s):  
Auditory Cortex ◽  
Shortest Paths ◽  
Network Configuration ◽  
Brain Areas ◽  
Opposite Hemisphere ◽  
Efficient Communication ◽  
Functional Lateralization ◽  
Left And Right ◽  
Auditory Cortices ◽  
The Right

Converging evidence from activation, connectivity and stimulation studies suggests that auditory brain networks are lateralized. Here we show that these findings can be at least partly explained by the asymmetric network embedding of the primary auditory cortices. Using diffusion-weighted imaging in three independent datasets, we investigate the propensity for left and right auditory cortex to communicate with other brain areas by quantifying the centrality of the auditory network across a spectrum of communication mechanisms, from shortest path communication to diffusive spreading. Across all datasets, we find that the right auditory cortex is better integrated in the connectome, facilitating more efficient communication with other areas, with much of the asymmetry driven by differences in communication pathways to the opposite hemisphere. Critically, the primacy of the right auditory cortex emerges only when communication is conceptualized as a diffusive process, taking advantage of more than just the topologically shortest paths in the network. Altogether, these results highlight how the network configuration and embedding of a particular region may contribute to its functional lateralization.

Modulation of Auditory Motion Processing by Visual Motion

2014 ◽  
Vol 28 (2) ◽  
pp. 82-100 ◽  
Author(s):  
Stephan Getzmann ◽  
Jörg Lewald
Keyword(s):  
Auditory Cortex ◽  
Visual Motion ◽  
Primary Auditory Cortex ◽  
Motion Processing ◽  
Motion Information ◽  
Cortical Processing ◽  
Auditory Motion ◽  
Motion Onset ◽  
Sound Motion ◽  
Onset Response

Neurophysiological findings suggested that auditory and visual motion information is integrated at an early stage of auditory cortical processing, already starting in primary auditory cortex. Here, the effect of visual motion on processing of auditory motion was investigated by employing electrotomography in combination with free-field sound motion. A delayed-motion paradigm was used in which the onset of motion was delayed relative to the onset of an initially stationary stimulus. The results indicated that activity related to the motion-onset response, a neurophysiological correlate of auditory motion processing, interacts with the processing of visual motion at quite early stages of auditory analysis in the dimensions of both the time and the location of cortical processing. A modulation of auditory motion processing by concurrent visual motion was found already around 170 ms after motion onset (cN1 component) in the regions of primary auditory cortex and posterior superior temporal gyrus: Incongruent visual motion enhanced the auditory motion onset response in auditory regions ipsilateral to the sound motion stimulus, thus reducing the pattern of contralaterality observed with unimodal auditory stimuli. No modulation was found in parietal cortex nor around 250 ms after motion onset (cP2 component) in any auditory region of interest. These findings may reflect the integration of auditory and visual motion information in low-level areas of the auditory cortical system at relatively early points in time.

Sound frequency affects the auditory motion-onset response in humans

2018 ◽  
Vol 236 (10) ◽  
pp. 2713-2726
Author(s):  
Mikaella Sarrou ◽  
Pia Marlena Schmitz ◽  
Nicole Hamm ◽  
Rudolf Rübsamen
Keyword(s):  
Sound Frequency ◽  
Auditory Motion ◽  
Motion Onset ◽  
Onset Response

Trading of dynamic interaural time and level difference cues and its effect on the auditory motion-onset response measured with electroencephalography

NeuroImage ◽  
2017 ◽  
Vol 159 ◽  
pp. 185-194 ◽  
Author(s):  
Christian F. Altmann ◽  
Ryuhei Ueda ◽  
Benoit Bucher ◽  
Shigeto Furukawa ◽  
Kentaro Ono ◽  
...  
Keyword(s):  
Auditory Motion ◽  
Motion Onset ◽  
Level Difference ◽  
Onset Response

scholarly journals Vehicular Control System Through VLC: An Application of Monochromatic Optical Filter

2019 ◽  
Vol 8 (2) ◽  
pp. 4508-4512
Keyword(s):  
Control System ◽  
Optical Filter ◽  
Optical Filters ◽  
Simulation Method ◽  
Angular Rotation ◽  
Simulation Process ◽  
Control Signals ◽  
Photo Detectors ◽  
Left And Right ◽  
To Receive

A vehicular control system operated in VLC spectrum is envisaged in this work which is control by optical monochromatic filters. Overall six numbers of monochromatic optical filters are designed by the help PWE simulation method by considering silicon grating structure (Si and SiO) as background semiconductor material to control the direction of the vehicular system. Further, Matlab Simulink is implemented to realize the different direction with the degree of angular rotation while moving in left and right direction. In the simulation process, Arduino board is used to receive the control signals from the filters through the photo detectors and then according to the program stored in the memory, the outputs are actuated to drive the vehicular system corresponding to each combination of the inputs.

Auditory Responses

2017 ◽  
pp. 200-213
Author(s):  
Riitta Hari ◽  
Aina Puce
Keyword(s):  
Steady State ◽  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Evoked Responses ◽  
Brainstem Auditory Evoked Potentials ◽  
Auditory Evoked Responses ◽  
Auditory Responses ◽  
Long Latency ◽  
Left And Right ◽  
Auditory Cortices

This chapter briefly describes the various types of evoked and event-related responses that can be recorded in response to auditory stimulation, such as clicks and tones, and speech. Transient auditory-evoked responses are generally grouped into three major categories according to their latencies: (a) brainstem auditory evoked potentials occur within the first 10 ms, typically with 5–7 deflections, (b) middle-latency auditory-evoked potentials occur within 12 to 50 ms, and (c) long-latency auditory-evoked potentials range from about 50 to 250 ms with generators in the supratemporal auditory cortex. Steady-state auditory responses can be elicited by periodic stimuli, They can be used in frequency-tagging experiments, for example in following inputs from the left and right ear to the auditory cortices of both hemispheres.

scholarly journals Left and right hemispheric lateralization of the amygdala in pain

2021 ◽  
Vol 196 ◽  
pp. 101891
Author(s):  
Heather N. Allen ◽  
Harley J. Bobnar ◽  
Benedict J. Kolber
Keyword(s):  
Hemispheric Lateralization ◽  
Left And Right

Hemispheric Laterality for Spatial Analysis in Children with Reading Problems

1986 ◽  
Vol 63 (2) ◽  
pp. 537-538 ◽  
Author(s):  
Sarah Grogan
Keyword(s):  
Spatial Perception ◽  
Visual Display ◽  
Spatial Processing ◽  
Poor Readers ◽  
Reading Problems ◽  
Left Hand ◽  
The Poor ◽  
Average Intelligence ◽  
Left And Right ◽  
Average Readers

Lateralisation for tactile-spatial perception was studied in 21 10- to 15-yr.-old boys of average intelligence who were underachieving in reading and 21 matched controls. Controls showed a significant advantage at recognising shapes on a visual display when they had been actively felt with the left hand. There was no difference between left- and right-hand scores in the poor readers. This supports Witelson's (1977) finding that poor readers are less lateralised for spatial-processing than are average readers.

Human cortical responses to slow and fast binaural beats reveal multiple mechanisms of binaural hearing

2014 ◽  
Vol 112 (8) ◽  
pp. 1871-1884 ◽  
Author(s):  
Bernhard Ross ◽  
Takahiro Miyazaki ◽  
Jessica Thompson ◽  
Shahab Jamali ◽  
Takako Fujioka
Keyword(s):  
Binaural Hearing ◽  
Gamma Oscillations ◽  
Neural Population ◽  
Neural Firing ◽  
Sound Location ◽  
Binaural Beats ◽  
Cortical Responses ◽  
Left And Right ◽  
Auditory Cortices ◽  
40 Hz

When two tones with slightly different frequencies are presented to both ears, they interact in the central auditory system and induce the sensation of a beating sound. At low difference frequencies, we perceive a single sound, which is moving across the head between the left and right ears. The percept changes to loudness fluctuation, roughness, and pitch with increasing beat rate. To examine the neural representations underlying these different perceptions, we recorded neuromagnetic cortical responses while participants listened to binaural beats at a continuously varying rate between 3 Hz and 60 Hz. Binaural beat responses were analyzed as neuromagnetic oscillations following the trajectory of the stimulus rate. Responses were largest in the 40-Hz gamma range and at low frequencies. Binaural beat responses at 3 Hz showed opposite polarity in the left and right auditory cortices. We suggest that this difference in polarity reflects the opponent neural population code for representing sound location. Binaural beats at any rate induced gamma oscillations. However, the responses were largest at 40-Hz stimulation. We propose that the neuromagnetic gamma oscillations reflect postsynaptic modulation that allows for precise timing of cortical neural firing. Systematic phase differences between bilateral responses suggest that separate sound representations of a sound object exist in the left and right auditory cortices. We conclude that binaural processing at the cortical level occurs with the same temporal acuity as monaural processing whereas the identification of sound location requires further interpretation and is limited by the rate of object representations.

scholarly journals Hemispheric Lateralization of Pain Processing by Amygdala Neurons

2009 ◽  
Vol 102 (4) ◽  
pp. 2253-2264 ◽  
Author(s):  
Guangchen Ji ◽  
Volker Neugebauer
Keyword(s):  
Receptive Fields ◽  
Hemispheric Lateralization ◽  
Central Nucleus ◽  
Recording Site ◽  
Peripheral Tissues ◽  
Arthritis Induction ◽  
Before And After ◽  
Pain State ◽  
Left And Right ◽  
The Right

Recent biochemical and behavioral data suggest right-hemispheric lateralization of amygdala functions in pain. Our previous electrophysiological studies showed pain-related neuroplasticity in the latero-capsular division of the central nucleus of the amygdala (CeLC) in the right brain hemisphere. Here we determined differences in the processing of pain-related signals in right versus left CeLC neurons. Individual CeLC neurons were recorded extracellularly before and after induction of an arthritis pain state in anesthetized rats. Brief innocuous and noxious test stimuli were applied to peripheral tissues ipsi- and contralateral to the recording site. A monoarthritis was induced in the ipsi- or contralateral knee by intraarticular injections of kaolin and carrageenan. Under normal conditions, CeLC neurons in the left amygdala had smaller receptive fields than those in the right, but the magnitude of background and evoked activity was not significantly different. After arthritis induction, neurons in the right, but not left, CeLC developed increased background activity and evoked responses, irrespective of the location of the arthritis (ipsi- or contralateral to the recording site). A protein kinase A (PKA) inhibitor decreased the activity of right CeLC neurons after arthritis induction but had no effect in the left amygdala. Forskolin, however, increased the activity of left and right CeLC neurons under normal conditions. The results show for the first time laterality of pain-related electrophysiological activity changes in individual amygdala neurons. Whereas both left and right amygdala neurons receive nociceptive inputs and can become sensitized in principle, a yet unknown mechanism prevents PKA activation and pain-related changes in the left amygdala.

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