optic lobe


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Related to optic lobe: frontal lobe, parietal lobe, temporal lobe

optic lobe

n.
Either of two lobes of the dorsal part of the midbrain, containing primary visual centers.

optic lobe

one of a pair of lobes found as swellings on the dorsal side of the midbrain of some lower vertebrates. The lobes integrate sensory information from the eyes and certain auditory reflexes. In mammals, the corpora quadrigemina are the equivalent of the optic lobes.
References in periodicals archive ?
Each optic lobe is as the synthesis of a large cavity, both sides are combined into the mesencephalon cavity, the boundary is not obvious, and the cavity is back to the fourth ventricle.
In the future, Riffell wants to test whether other shapes affect mosquito behavior and activity in the optic lobe. Those results may further illuminate the hierarchical nature of mosquito host-hunting behaviors: smell first, then see.
Modulation of spontaneous and evoked EPSCs and IPSCs in optic lobe neurons of cuttlefish Sepia officinalis by the neuropeptide FMRF-amide.
The OG is located over the optic stalk close to the optic lobe, it is covered by a fine connective layer, and has an elongate shape.
The transverse fissure separated the caudal pole of the cerebral hemispheres from the cerebellum dorsally and extended to separate the optic lobe laterally and ventrally (Fig.
Using advances in the purification of SVs from rat brain (Huttner et al., 1983), we optimized an SV isolation protocol for squid (Logilo pealei [LeSueur, 1821]) optic lobe in this study to obtain a highly pure and intact SV population for biochemical and ultrastructural studies.
After the animals were sacrificed, the optic lobes were rapidly dissected from the animals and frozen at -70 [degrees]C.
(17) found that changing the external [K.sup.+] concentration from 10 to 30 mmol [1.sup.-1] KCl evoked a transient increase in cytoplasmic [Ca.sup.2+] in synaptosomes isolated from squid optic lobe. The [Ca.sup.2+] transient in that study was calculated to be around 340 nmol [1.sup.-1] and reached its maximal level in less than 10 s, which seems to be consisent with the typical behavior of voltage-gated [Ca.sup.2+] channels that inactivate rapidly.
Two major parts of the nervous system, the optic lobes and the nervous system of the arms, lie outside the brain capsule.
Following de-waxing and rehydration, sections containing photoreceptors were immunolabeled for calexcitin using a polyclonal antibody (25U2; cloned from squid optic lobe and raised in rabbit; 1:1000 dil.) (3, 5).
For the latter, an average density of 4.6 X [10.sup.6] per cubic millimeter in the housefly Musca domestica [16] corresponds to a mean cell diameter of 7.5 [micro]m; and neuronal diameters in the Drosophila optic lobe fall between 3.6 and 5.0 [micro]m for lamina monopolar cells and 2.8 and 4.2 [micro]m for medulla cells (measurements from ref.
We refer to these regions as the dorsofrontal neuropil, optic lobe neuropil, and median protocerebral neuropil.