Salivary reactions after ventromedial hypothalamic lesions in dogs.
نویسندگان
چکیده
Lesions of the ventromedial hypothalamic nucleus produced an increase of food intake and body weight, marked augmentation of intertrial salivation, and transient disinhibition of salivation to the differentiated conditioned stimulus. It is concluded that damage of the ventromedial hypothalamic nucleus produces an increase of alimentary drive.
منابع مشابه
Salivary reactions in dogs with dorsomedial amygdalar lesions.
In dogs with chronic parotid fistula, conditioned salivary reactions reinforced by food were established. After bilateral lesions of the dorsomedial part of the amygdaloid complex, the conditioned salivary reactions were greatly diminished. Also the unconditioned salivation decreased. This decrease was greater in dogs which revealed the whole syndrome of amygdalar aphagia, but it was also evide...
متن کاملImpairment of salivary reflexes after lateral hypothalamic lesions in dogs.
The effects of lateral hypothalamic lesions on salivary conditioned and unconditioned reflexes were investigated on seven dogs. Subsequent to the operation during the period of aphagia and hypophagia a total lack (6 dogs), or a decrease (1 dog) of conditioned salivary reaction was found. Strong diminution of unconditioned reactions and intertrial salivation were observed. At the end of the obse...
متن کاملVENTROMEDIAL HYPOTHALAMIC NUCLEI AND FEEDING BEHAVIOR
The role of the ventromedial nuclei of the hypothalamus (VMN) in food behavior was studied in adult male rats, allocated in 3 groups: control, sham and lesioned. Electrolytic lesions were induced stereotaxically (1.2 mA, 15 sec). Results revealed a significant decrease (p<O.05) in body weight (BW) and food intake (FI) in the order of lesioned <sham <control during the fIrst week. However, ...
متن کاملThe effects of ventromedial hypothalamic lesions on food intake and alimentary instrumental conditioned reflexes in dogs.
There is considerable evidence that the ventromedial part of hypotha-lamus is an important part of the alimentary system playing the role of the satiety center. Several experiments have shown that bilateral lesions of the ventromedial hypothalamic nucleus produce marked overeating and lead to obesity. Conversely electrical stimulation of this area by means of chronically implanted electrodes in...
متن کاملAutonomic responses accompanying conditioned and unconditioned alimentary reactions in amygdalo-hypothalamically lesioned dogs.
Lesions in the amygdalo-hypothalamic system decreased conditioned and unconditioned alimentary responses in five dogs. During three postoperative months no improvement was observed. The introduction of the new food reward (chosen for each dog as the most preferred) produced a sudden or progressive increase of conditioned and unconditioned alimentary performance. In the cardiac responses accompa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Acta neurobiologiae experimentalis
دوره 33 3 شماره
صفحات -
تاریخ انتشار 1973