Number of found documents: 136
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Functional characteristics of neurons in the auditory thalamus
Kvašňák, Eugen; Šuta, Daniel; Popelář, Jiří; Syka, Josef
2001 - English
The MGB, is similarly as the inferior colliculus (IC) is organized into three subdivisions, with the ventral MGB characterized by the quickest onset reaction with the lowest thresholds to auditory stimulation and with the same ratio of monotonic and non-monotonic RLFs. Keywords: auditory thalamus Available at various institutes of the ASCR
Functional characteristics of neurons in the auditory thalamus

The MGB, is similarly as the inferior colliculus (IC) is organized into three subdivisions, with the ventral MGB characterized by the quickest onset reaction with the lowest thresholds to auditory ...

Kvašňák, Eugen; Šuta, Daniel; Popelář, Jiří; Syka, Josef
Ústav experimentální medicíny, 2001

A behavioral and electrophysiological study of the effects of noise exposure on auditory function in rat
Rybalko, Natalia; Mazelová, Jana; Syka, Josef
2001 - English
The values of the gap detection threshold doubled after exposure to 110 dB SPL and quadrupled after exposure to 115-120 dB SPL. GDT recovered to the original values during 1-2 weeks. Increased gap detection thresholds after noise exposure appear connected with elevated hearing thresholds, the deterioration in the performance of some animals in behavioral rasts after strong intensity noise (120 dB SPL) may signal the occurrence of tinnitus in these animals. Keywords: auditory system Available at various institutes of the ASCR
A behavioral and electrophysiological study of the effects of noise exposure on auditory function in rat

The values of the gap detection threshold doubled after exposure to 110 dB SPL and quadrupled after exposure to 115-120 dB SPL. GDT recovered to the original values during 1-2 weeks. Increased gap ...

Rybalko, Natalia; Mazelová, Jana; Syka, Josef
Ústav experimentální medicíny, 2001

Neuron-glia communication by extrasynaptic transmission
Syková, Eva
2001 - English
Dynamic changes in ECS ionic composition, volume and geometry accompany neuronal activity, neuronal loss, glial development and proliferation, aging, CNS injury, anoxia/ischemia, spreading depression, tumors, inflammation dyemyelination and many other brain pathological states. Keywords: neuronal activity Available at various institutes of the ASCR
Neuron-glia communication by extrasynaptic transmission

Dynamic changes in ECS ionic composition, volume and geometry accompany neuronal activity, neuronal loss, glial development and proliferation, aging, CNS injury, anoxia/ischemia, spreading depression, ...

Syková, Eva
Ústav experimentální medicíny, 2001

Up-regulation of delayed outwardly rectifying potassium currents in reactive astrocytes after certical stab wound
Anděrová, Miroslava; Neprašová, H.; Petřík, D.; Chvátal, Alexandr; Syková, Eva
2001 - English
Hypertrophied astrocytes in the close vicinity of the stab wound are characterized by an up-regulation of delayed outwardly rectifying K+ currents and increased K+ accumulation in the vicinity of the astrocyte membrane. Keywords: astrocytes Available at various institutes of the ASCR
Up-regulation of delayed outwardly rectifying potassium currents in reactive astrocytes after certical stab wound

Hypertrophied astrocytes in the close vicinity of the stab wound are characterized by an up-regulation of delayed outwardly rectifying K+ currents and increased K+ accumulation in the vicinity of the ...

Anděrová, Miroslava; Neprašová, H.; Petřík, D.; Chvátal, Alexandr; Syková, Eva
Ústav experimentální medicíny, 2001

Abnormal skeletogenesis occurs in the Splotch (Sp2H) Mutant
Lišková, J.; Růžičková, Kateřina; Buckiová, Daniela
2001 - English
Homozygous Splotch embryos (days 16.5-18.5 of gestation)displayed severe rib and neural arches abnormalities. (100% penetrance). Keywords: pax 3; skeletal; defects Available at various institutes of the ASCR
Abnormal skeletogenesis occurs in the Splotch (Sp2H) Mutant

Homozygous Splotch embryos (days 16.5-18.5 of gestation)displayed severe rib and neural arches abnormalities. (100% penetrance).

Lišková, J.; Růžičková, Kateřina; Buckiová, Daniela
Ústav experimentální medicíny, 2001

Interaction between descending and ascending pathways in the auditory system
Syka, Josef
2001 - English
Inactivation of the AC resulted in changes in the latency and amplitude of some parts of click-evoked IC responses and in either an increase or decrease in the firing rate of IC neurons in comparison with normal control conditions. The interaction of ascending and descending pathways in the auditory system may contribute to better frequency tuning, suppression of non-relevant acoustical signals and concentration of our attention on specific signals (for example the voice of the speaker.) Keywords: acoustical stimulation Available at various institutes of the ASCR
Interaction between descending and ascending pathways in the auditory system

Inactivation of the AC resulted in changes in the latency and amplitude of some parts of click-evoked IC responses and in either an increase or decrease in the firing rate of IC neurons in comparison ...

Syka, Josef
Ústav experimentální medicíny, 2001

NADPH-d - positive neurons in the auditory cortex of young and very old rats
Nwabueze-Ogbo, Fidel Chijoke; Druga, R.; Syka, Josef
2001 - English
In young and very old animals stained neurons were localized in layers II-VI and in the subcortical white matter. A significantly higher packing density of labeled supragranular layers. In very old animals the thickness of the auditory cortex and the neuronal density was reduced when compared to the young. Keywords: auditory cortex Available at various institutes of the ASCR
NADPH-d - positive neurons in the auditory cortex of young and very old rats

In young and very old animals stained neurons were localized in layers II-VI and in the subcortical white matter. A significantly higher packing density of labeled supragranular layers. In very old ...

Nwabueze-Ogbo, Fidel Chijoke; Druga, R.; Syka, Josef
Ústav experimentální medicíny, 2001

Suppression of 2f1-f2 distortion product otoacoustic emissions by electrical stimulation of the inferior colliculus in guinea pigs
Popelář, Jiří; Mazelová, Jana; Syka, Josef
2001 - English
Electrical stimulation of certain parts of the IC resulted in the depression of the DPOAE amplitude by 0.1-2 dB. The value of maximal DPOAE suppression was similar to the DPOAE suppression produced by acoustical stimulation of the contralateral ear. Our results indicate that electrical stimulation of the external cortex of the IC can activate the efferent system and produce DPOAE suppression by similar mechanisms as does acoustical stimulation of the contralateral ear. Keywords: guinea pigs Available at various institutes of the ASCR
Suppression of 2f1-f2 distortion product otoacoustic emissions by electrical stimulation of the inferior colliculus in guinea pigs

Electrical stimulation of certain parts of the IC resulted in the depression of the DPOAE amplitude by 0.1-2 dB. The value of maximal DPOAE suppression was similar to the DPOAE suppression produced by ...

Popelář, Jiří; Mazelová, Jana; Syka, Josef
Ústav experimentální medicíny, 2001

Biocompatible polymer hydrogels usable for nervous tissue regeneration
Lesný, Petr; DeCroos, Jane; Přádný, Martin; Vacík, Jiří; Syková, Eva
2001 - English
PHPMA hydrogel matrices have the ability to induce tissue formation within them and therefore support the regeneration of nervous tissue. Keywords: hydrogels Available at various institutes of the ASCR
Biocompatible polymer hydrogels usable for nervous tissue regeneration

PHPMA hydrogel matrices have the ability to induce tissue formation within them and therefore support the regeneration of nervous tissue.

Lesný, Petr; DeCroos, Jane; Přádný, Martin; Vacík, Jiří; Syková, Eva
Ústav experimentální medicíny, 2001

Development of right-left asymmetry in the chick embryo
Buckiová, Daniela; Kofroňová, Olga; Jelínek, R.
2001 - English
Using SEM we have studied the ventral surface of the chick node. In contrast to mouse, we have found neither the pit nor the cilia. Keywords: cilia; node; chick Available at various institutes of the ASCR
Development of right-left asymmetry in the chick embryo

Using SEM we have studied the ventral surface of the chick node. In contrast to mouse, we have found neither the pit nor the cilia.

Buckiová, Daniela; Kofroňová, Olga; Jelínek, R.
Ústav experimentální medicíny, 2001

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