Banca de DEFESA: BRENO TERCIO SANTOS CARNEIRO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : BRENO TERCIO SANTOS CARNEIRO
DATA : 30/06/2017
HORA: 14:00
LOCAL: Auditório do Museu de Ciências Morfológicas
TÍTULO:

Evaluation of Food Odor as a Temporal Cue in Rats Entrained to Food Availability

PALAVRAS-CHAVES:

Food anticipatory activity; Food entrained oscillator; Odor; Olfactory stimulation.

PÁGINAS: 74
GRANDE ÁREA: Ciências Humanas
ÁREA: Psicologia
RESUMO:

The circadian rhythmicity presents itself as a common aspect in living beings, with the24 h light-dark cycle being its most obvious environmental synchronizer. The availability of food also constitutes an environmental synchronizer, which is evidenced in many species. In mammals, food entrainment is mainly characterized by increased locomotion, wakefulness and core body temperature in the hours before feeding. Convincing evidence shows that this anticipation is controlled by a true circadian oscillatory system, although its physical structure is unknown. The search for the physical substrate of the food-entrained oscillator has always been the main focus of the research in this area, and recent evidence shows that several brain regions seem to be involved in the synchronization by food. In recent years, in addition to the search for the neural substrate of this system, attention has been paid to its possible mechanisms of synchronization. In other words, what would be the signals responsible for the synchronization of the system. In this work, the objective was to investigate whether daily stimulation with food odor is a sufficient signal to induce anticipation in Wistar rats. The animals were kept in a light-dark cycle of 14h light and 10h dark with continuous recording of the motor activity inside wooden cabins. Four groups were used: Chow, Odor, Arousal and Arousal-Isolated. All were submitted to 10 days of feeding ad libitum (baseline). Subsequently, the Food Restriction (19 days) stage was started. Finally, all groups were submitted to Food Deprivation (2 days). The Chow group received two meals a day for one hour each, with 'Meal 1' in the 3rd hour of the light phase and 'Meal 2' at the 12th hour of the light phase. The Odor group received odor stimulation at the 3rd hour of the light phase ('Meal 1') and food at the 12th hour. The Arousal group was only stimulated (opening and closing the cabin) in 'Meal 1' and fed in 'Meal 2'. The Arousal-Isolated group was submitted to the same previous procedure, but was tested alone in the room. All groups presented intense anticipatory activity to 'Meal 2' (feeding). For 'Meal 1', the Chow group presented intense anticipation, the Odor and Alert groups presented mild anticipatory activity mainly
during the first 10 days of stimulation, and the Arousal-Isolated group did not present anticipation. The results indicate that the odor stimulation is able to promote behavioral anticipation, but weakly, with habituation over the days. Similar responses between the Odor and Arousal groups are discussed considering the possible odor effect in the experiment room.

MEMBROS DA BANCA:
Externo à Instituição - CRHISTIANE ANDRESSA DA SILVA - UFPE
Externo ao Programa - 1110960 - JANE CARLA DE SOUZA
Presidente - 1216466 - JOHN FONTENELE ARAUJO
Interno - 2998660 - MARIO ANDRE LEOCADIO MIGUEL
Externo à Instituição - RHOWENA JANE BARBOSA DE MATOS - UFPE