Evidence of an extended representation of the visual field in the superior colliculus of the rabbit (Oryctolagus cuniculus).

نویسنده

  • C Sitthi-Amorn
چکیده

Electrophysiological mapping using multiple-unit criteria was employed to study the representation of the visual field in the superior colliculus of the rabbit. It was found that the contralateral superior colliculus of the rabbit has an extended representation beyond the representation of the zero vertical meridian or the line of decussation in the geniculostriate system. The amount of extended representation in the contralateral superior colliculus is coextensive with the extent of visual field represented ipsilaterally in areas 17 and 18 of the visual cortex. In agreement with previous findings, the representation of the visual field on the superior colliculus is extremely distorted. Finally, no evidence of an ipsilateral input can be produced.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Distribution and relative frequency of immunohistochemically detected endocrine cells in the stomach of New Zealand White rabbit (Oryctolagus cuniculus)

Background: Gastrointestinal (GI) endocrine cells produce many GI hormones that perform various physiological functions of the digestive system. Aims: We aimed to investigate the presence and distribution of immunoreactive (IR) endocrine cells to glucagon, somatostatin, cholecystokinin-8 (CCK-8), serotonin, secretin and histamine in the stomach of adult male Ne...

متن کامل

Regional and mucosal distributions of some intestinal immunoreactive endocrine cells in New Zealand white rabbit (Oryctolagus cuniculus L.)

The aim of this study was to detect the regional and mucosal distribution of endocrine cells that secrete gulcagon, somatostatin, Chyholecystokinin-8 (CCK-8), serotonin, secretin, substance P (SP) and histamine in the small and large intestine of New Zealand white rabbit (Oryctolagus cuniculus L.) using immunohistochemical peroxidase-antiperoxidase (PAP) method. It was found that most of the im...

متن کامل

The distribution of the cardiac veins in the New Zealand White rabbits (Oryctolagus cuniculus)

In this investigation, 25 adult New Zealand White rabbits randomly selected from both sexes and studied.Coloured latex injection and corrosion cast methods were applied on the materials. This study was carried out to disclose the distribution of the cardiac veins of the New Zealand White rabbits. The veins that drain the heart were found to be the great cardiac vein, the middle cardiac vein, th...

متن کامل

Gap-like junctions between neurons and glia in the superior colliculus of mammals.

The neuron cell bodies and glia cells are separated by a narrow intercellular cleft of 200 A. We present here evidence that perikarya neuronal and perineuronal glia of the superior colliculus of the Oryctolagus Cuniculus communicate through gap-like junctions according to ultrastructural parameters. These junctions would mean some degree of electronic coupling between neuron cell bodies and per...

متن کامل

First epizootic of rabbit hemorrhagic disease in free living populations of Oryctolagus cuniculus at Doñana National Park, Spain.

The first known epizootic of rabbit hemorrhagic disease (RHD) occurred in two free-living wild rabbit (Oryctolagus cuniculus) populations at Doñana National Park, Spain. Rabbit population density was not correlated to RHD mortality. Only adult animals were affected; males and females had similar mortality rates.

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • Indian journal of physiology and pharmacology

دوره 20 4  شماره 

صفحات  -

تاریخ انتشار 1976