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Titolo:
Azimuthal directional sensitivity of prepulse inhibition of the pinna startle reflex in decerebrate rats
Autore:
Li, L; Frost, BJ;
Indirizzi:
Queens Univ, Dept Psychol, Kingston, ON K7L 3N6, Canada Queens Univ Kingston ON Canada K7L 3N6 chol, Kingston, ON K7L 3N6, Canada
Titolo Testata:
BRAIN RESEARCH BULLETIN
fascicolo: 1, volume: 51, anno: 2000,
pagine: 95 - 100
SICI:
0361-9230(20000101)51:1<95:ADSOPI>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
PEDUNCULOPONTINE TEGMENTAL NUCLEUS; SUPERIOR OLIVARY COMPLEX; KAINIC ACID LESIONS; INFERIOR COLLICULUS; ACOUSTIC STARTLE; LATERAL LEMNISCUS; DORSAL NUCLEUS; BINAURAL RESPONSES; ALBINO-RAT; SOUND LOCALIZATION;
Keywords:
pinna startle reflex; prepulse inhibition; azimuthal directional sensitivity; cervicoauricular muscles; decerebrate rats;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
49
Recensione:
Indirizzi per estratti:
Indirizzo: Li, L Univ Toronto, Dept Psychol, Toronto, ON M5S 3G3, Canada Univ Toronto Toronto ON Canada M5S 3G3 Toronto, ON M5S 3G3, Canada
Citazione:
L. Li e B.J. Frost, "Azimuthal directional sensitivity of prepulse inhibition of the pinna startle reflex in decerebrate rats", BRAIN RES B, 51(1), 2000, pp. 95-100

Abstract

Previous studies have indicated that the auditory midbrain, the inferior colliculus, is important for both sound localization and mediation of prepulse inhibition of the startle reflex. The present study investigated the azimuthal directional sensitivity of prepulse inhibition of the pinna startle reflex in decerebrate rats. The pinna startle reflex was measured by recording multi-unit action potentials from the cervicoauricular muscles. The startling noise burst (94 dB SPL) was produced by a stationary speaker at 0 degrees azimuth, and the non-startling prepulse noise burst (46 dB SPL) was produced by a movable speaker whose direction was changed in the frontal azimuthal plane. The interval between the onset of the prepulse sound and the onset of the startling sound was 100 ms. The pinna reflex to the startling sound was strongly inhibited by the prepulse sound, and the inhibited startle response exhibited a flat azimuthal directional curve. In addition to further confirming that the neural pathways mediating prepulse inhibition arelocated in the brainstem, the present results indicate that interaural disparities of binaural inputs used for sound localization are not capable of modulating prepulse inhibition of the startle reflex. (C) 2000 Elsevier Science Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/01/20 alle ore 18:48:06