Electrophysiology of the Insect Dorsal Ocellus
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چکیده
منابع مشابه
Electrophysiology of the Insect Dorsal Ocellus
Dorsal ocelli are small cup-like organs containing a layer of photoreceptor cells, the short axons of which synapse at the base of the cup with dendritic terminals of ocellar nerve fibers. The ocellar ERG of dragonflies, recorded from the surface of the receptor cell layer and from the long lateral ocellar nerve, contains four components. Component 1 is a depolarizing sensory generator potentia...
متن کاملElectrophysiology of the Insect Dorsal Ocellus I. Origin of the components of the electroretinogram
Dorsal ocelli are small cup-like organs containing a layer of photoreceptor ceils, the short axons of which synapse at the base of the cup with dendritic terminals of ocellar nerve fibers. The ocellar ERG of dragonflies, recorded from the surface of the receptor cell layer and from the long lateral ocellar nerve, contains four components. Component 1 is a depolarizing sensory generator potentia...
متن کاملElectrophysiology of the Insect Dorsal Ocellus II. Mechanisms of generation and inhibition of impulses in the ocellar nerve of dragonflies
I N T R O D U C T I O N T h e insect dorsal ocellus contains a layer of pho to recep to r cells, a synapt ic region in which axons of the pho to recep to r cells come into contac t with dendri tes of ocel lar nerve fibers (the cell bodies of which lie in the brain) , and an ocellar nerve along which the ocellar nerve fibers pass into the brain. T h e ocellar E R G can be ana lyzed into four com...
متن کاملThe function of the insect ocellus.
INTRODUCTION Many insects possess two types of eye: a compound eye and a simple eye or dorsal ocellus. Much work has been done on the powers of vision in insects, and it is known that these are almost entirely due to the presence and form of the compound eye. The perception of form and colour, and the appreciation of movement in the visual field, are its recognized functions. No such clearly de...
متن کاملElectrophysiology of the Insect Dorsal OceUus III. Responses to j ckering light of the dragonfly oceUus
The ERG of the dragonfly ocellus has been analyzed into four components, two of which originate in the photoreceptor cells, two in the ocellar nerve fibers (Ruck, 1961 a). Component 1 is a sensory generator potential, component 2 a response of the receptor axons. Component 3 is an inhibitory postsynaptic potential, component 4, a discharge of afferent nerve impulses in ocellar nerve fibers. Res...
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ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 1961
ISSN: 1540-7748,0022-1295
DOI: 10.1085/jgp.44.3.605