AMACRINES Meaning and
Definition
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Amacrines are a type of specialized neuroglial cells found in the retina of the eyes. They are non-photoreceptor cells that play a crucial role in visual processing and communication between different types of retinal cells.
Typically located in the inner nuclear layer of the retina, amacrines function as interneurons, transmitting information between bipolar cells and ganglion cells, which are responsible for sending visual signals to the brain. They form part of the complex neural network within the retina that allows for the integration and processing of visual information.
Amacrines are characterized by their diverse morphology and function. There are several identified subtypes of amacrine cells, each with distinct connections and neurotransmitter characteristics. Some amacrines release inhibitory neurotransmitters, while others release excitatory neurotransmitters, thereby modulating the activity of other retinal cells.
These cells play a crucial role in various visual functions, such as contrast enhancement, motion detection, and color processing. Amacrines contribute to the formation of receptive fields in the retina, aiding in the detection of edges and contours in visual stimuli.
Overall, amacrines are essential components of the retinal circuitry, facilitating the transmission and processing of visual signals. Their intricate connections and diverse functions underline their significance in visual information processing and contribute to the overall functioning of the visual system.
Etymology of AMACRINES
The word "amacrines" is derived from the Latin word "amacrina", which means "belonging to the Amacri tribe". The Amacri were a indigenous tribe native to Brazil. In the context of biology, "amacrine" refers to a type of neuron in the retina of the eye that does not possess an axon. The plural form "amacrines" is used to describe multiple or a group of these neurons.
