By Olga Petre-Quadens

ISBN-10: 0125529503

ISBN-13: 9780125529501

ISBN-10: 0323148794

ISBN-13: 9780323148795

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For example, the animal may stop eating, look around, and walk, a behavioral response which may be classified as mild arousal; however, it will sometimes start to flutter its eyelids, yawn, fluff its plumage, retract its head and close its eyes, a behavior which may be regarded as sleep. 2 In other cases a rooster was feeding calmly, stopped eating, and fixated a nonexisting object, and finally j u m p e d away fearfully: 2 Similar observations were later reported by Sterman and Clemente (1962b; Fig.

Chronic thalamic pigeon, 4 weeks after ablation of the cerebral hemispheres. Stimulation of n. 5 V) at a repetition rate of i/sec, for 15 sec, followed by 10 sec of rest. A. Control before stimulation. B, C, and D. After the first, third, and fifth group of trains. , 1972] tendency toward sleep, one that was counteracted by a strongly motivated feeding behavior. Thus, suppression of feeding activities would be indirect cause of sleep. We have not enough data to permit a statistical evaluation. We may simply note that feeding behavior was abolished by the first group of trains, while at least three groups were required to produce sleep.

The chronic thalamic pigeon and the androgen-treated male, on the other hand, provide several stereotyped background patterns of waking behavior. Our purpose was to compare the effects of electrical stimulations of the same area of the pontine reticular formation on sleep posture and on given types of waking behavior. i. The Sleep-Waking Cycle in the Acute Thalamic Pigeon The ablation of the cerebral hemispheres provides us with what is called the acute thalamic pigeon. In fact, if secondary lesions are avoided, the thalamus Preliminary notes were presented in 1971 at the international Congress of Physiology (München) and at the Accademia dei Lincei.

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Basic Sleep Mechanisms by Olga Petre-Quadens

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