Deep brain stimulation of the inferior colliculus: A possible animal model to study paradoxical kinesia observed in some parkinsonian patients?

Autor(es)

Melo-Thomas, Liana ^{[1, 2, 3]} ; Thomas, Uwe ^[4]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Paulo, Dept Biociencias, BR-11060001 Santos, SP - Brazil

^[2] INEC, Inst Neurociencias & Comportamento, BR-14050220 Ribeirao Preto, SP - Brazil

^[3] Univ Marburg, D-35032 Marburg - Germany

^[4] Thomas RECORDING GmbH, D-35394 Giessen - Germany

• Tipo de documento: Artigo Científico
• Fonte: Behavioural Brain Research; v. 279, p. 1-8, FEB 15 2015.
• Citações Web of Science: 9

Resumo

The inferior colliculus (IC) plays an important role in the normal processing of the acoustic message and is also involved in the filtering of acoustic stimuli of aversive nature. The neural substrate of the IC can also influence haloperidol-induced catalepsy. Considering that (i) paradoxical kinesia, observed in some parkinsonian patients, seems to be dependent of their emotional state and (ii) deep brain stimulation (DBS) represents an alternative therapeutic route for the relief of parkinsonian symptoms, the present study investigated the consequence of DBS at the IC on the catalepsy induced by haloperidol in rats. Additionally, we investigated if DBS of the IC can elicit motor responses in anesthetized rats and whether DBS elicits distinct neural firing patterns of activity at the dorsal cortex (DCIC) or central nucleus (CNIC) of the IC. A significant reduction of the catalepsy response was seen in rats previously given haloperidol and receiving DBS at the IC. In addition, electrical stimulation to the ventral part of the CNIC induced immediate motor responses in anesthetized rats. The neuronal spontaneous activity was higher at the ventral part of the CNIC than the dorsal part. DBS to the ventral part but not to the dorsal part of the CNIC increased the spike rate at neurons a few hundred microns away from the stimulation site. It is possible that the IC plays a role in the sensorimotor gating activated by emotional stimuli, and that DBS at the IC can be a promising new animal model to study paradoxical kinesia in rats. (C) 2014 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 11/01409-4 - Estimulação elétrica e registro da atividade neural do colículo inferior durante a catalepsia induzida pelo haloperidol: estudo comportamental e eletrofisiológico
• Beneficiário: Liana Melo-Thomas
• Modalidade de apoio: Auxílio à Pesquisa - Regular