scholarly journals Mapping of the Receptive Fields in the Optic Tectum of Chicken (Gallus gallus) Using Sparse Noise

PLoS ONE ◽  
2013 ◽  
Vol 8 (4) ◽  
pp. e60782 ◽  
Author(s):  
Josine Verhaal ◽  
Harald Luksch
Keyword(s):  
Optic Tectum ◽  
Receptive Fields ◽  
Gallus Gallus

Single unit receptive fields and the cellular layers of the pigeon optic tectum

1974 ◽  
Vol 80 (3) ◽  
pp. 365-377 ◽  
Author(s):  
Charles F. Hughes ◽  
Alan L. Pearlman
Keyword(s):  
Optic Tectum ◽  
Single Unit ◽  
Receptive Fields

scholarly journals Distinct neural mechanisms construct classical versus extraclassical inhibitory surrounds in an inhibitory nucleus in the midbrain attention network

2020 ◽  
Author(s):  
Hannah M. Schryver ◽  
Jing Xuan Lim ◽  
Shreesh P. Mysore
Keyword(s):  
Spatial Attention ◽  
Optic Tectum ◽  
Receptive Fields ◽  
Neural Mechanisms ◽  
Competitive Interactions ◽  
Inhibitory Neurons ◽  
Stimulus Selection ◽  
Critical Importance ◽  
Attention Network ◽  
Fundamental Units

ABSTRACTInhibitory neurons in the midbrain spatial attention network, called isthmi pars magnocellularis (Imc), control stimulus selection by the sensorimotor and attentional hub, the optic tectum (OT). Here, we investigate in the barn owl how classical as well as extraclassical (global) inhibitory surrounds of Imc receptive fields (RFs), fundamental units of Imc computational function, are constructed. We find that focal, reversible blockade of GABAergic input onto Imc neurons disconnects their extraclassical inhibitory surrounds, but, surprisingly, leaves intact their classical surrounds. Subsequently, with paired recordings and iontophoresis, first at spatially aligned site-pairs in Imc and OT, and then, at mutually distant site-pairs within Imc, we demonstrate that classical inhibitory surrounds of Imc RFs are inherited from OT, but their extraclassical inhibitory surrounds are constructed within Imc. These results reveal key design principles of the midbrain spatial attention circuit, and attest to the critical importance of competitive interactions within Imc for its operation.

Hearing Impairment Induces Frequency-Specific Adjustments in Auditory Spatial Tuning in the Optic Tectum of Young Owls

1999 ◽  
Vol 82 (5) ◽  
pp. 2197-2209 ◽  
Author(s):  
Joshua I. Gold ◽  
Eric I. Knudsen
Keyword(s):  
Optic Tectum ◽  
Frequency Tuning ◽  
Receptive Fields ◽  
Dependent Manner ◽  
Frequency Dependent ◽  
Auditory Space ◽  
Spatial Tuning ◽  
Auditory Experience ◽  
Tectal Neurons ◽  
Interaural Level Differences

Bimodal, auditory-visual neurons in the optic tectum of the barn owl are sharply tuned for sound source location. The auditory receptive fields (RFs) of these neurons are restricted in space primarily as a consequence of their tuning for interaural time differences and interaural level differences across broad ranges of frequencies. In this study, we examined the extent to which frequency-specific features of early auditory experience shape the auditory spatial tuning of these neurons. We manipulated auditory experience by implanting in one ear canal an acoustic filtering device that altered the timing and level of sound reaching the eardrum in a frequency-dependent fashion. We assessed the auditory spatial tuning at individual tectal sites in normal owls and in owls raised with the filtering device. At each site, we measured a family of auditory RFs using broadband sound and narrowband sounds with different center frequencies both with and without the device in place. In normal owls, the narrowband RFs for a given site all included a common region of space that corresponded with the broadband RF and aligned with the site's visual RF. Acute insertion of the filtering device in normal owls shifted the locations of the narrowband RFs away from the visual RF, the magnitude and direction of the shifts depending on the frequency of the stimulus. In contrast, in owls that were raised wearing the device, narrowband and broadband RFs were aligned with visual RFs so long as the device was in the ear but not after it was removed, indicating that auditory spatial tuning had been adaptively altered by experience with the device. The frequency tuning of tectal neurons in device-reared owls was also altered from normal. The results demonstrate that experience during development adaptively modifies the representation of auditory space in the barn owl's optic tectum in a frequency-dependent manner.

Visual receptive fields of single cells in the pigeon's optic tectum

1972 ◽  
Vol 40 (2) ◽  
pp. 303-317 ◽  
Author(s):  
Dora Jassik-Gerschenfeld ◽  
Jack Guichard
Keyword(s):  
Optic Tectum ◽  
Single Cells ◽  
Receptive Fields ◽  
Visual Receptive Fields

The evolution of the retinotectal map during development in Xenopus

1974 ◽  
Vol 185 (1080) ◽  
pp. 301-330 ◽  
Keyword(s):  
Optic Tectum ◽  
Receptive Fields ◽  
Visual Responses ◽  
Adult Type ◽  
Retinotectal Projection ◽  
Temporal Pole ◽  
Retinotopic Organization ◽  
Visual Projection ◽  
Rostral Region ◽  
Temporal Field

The retinotectal projection was mapped eleetrophysiologically in tadpoles of Xenopus laevis . Recording was performed with the animals immersed in saline inside a transparent hemisphere. Visual responses could be recorded from the optic tectum from about stage 43 onwards. The visual map on the tectum of the tadpole was found to differ in several respects from that in the adult. The earliest responses recorded showed very large multi-unit receptive fields and no discernible retinotopic organization. From about stage 47 the map showed the adult type of order; nasal field projected rostrally, temporal field caudally, superior field medially and inferior field laterally. However, in tadpoles up to stage 63/64 the projection was markedly distorted in that nasal field was confined to the most rostral region of the tectum and theie was an expanded representation of the temporal pole of the field. In tadpoles the entire visual projection covers only the rostral one-half to two-thirds of the tectum. These results, in conjunction with the results of previous studies on the mode of growth of the retina and tectum, indicate a progressive shift of the retinotectal projection with development which may involve changing synaptic relations between retinal fibres and tectal cells.

Sign in / Sign up

Export Citation Format

Share Document