occipital lobe


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to occipital lobe: frontal lobe, parietal lobe, temporal lobe

lobe

 [lōb]
1. a more or less well defined portion of an organ or gland.
2. one of the main divisions of a tooth crown.
azygos lobe (lobe of azygos vein) a small anomalous lobe situated at the apex of the right lung, produced when the azygos vein arches over the upper part of the lung instead of at the hilus and presses deeply into the lung tissue to form a fissure that isolates a medial part of the lung.
caudate lobe a small lobe of the liver between the inferior vena cava on the right and the left lobe.
ear lobe the lower fleshy, noncartilaginous portion of the external ear.
flocculonodular lobe one of the main subdivisions of the cerebellum, located inferiorly, consisting of the paired flocculi, their peduncles, and the nodule of the vermis.
frontal lobe the anterior portion of the gray matter of each cerebral hemisphere.
hepatic lobe one of the lobes of the liver, designated the right and left and the caudate and quadrate.
l's of lung the five major subdivisions of the lungs. see accompanying illustration and see lung.
The lobes of the lungs. From Frazier et al., 2000.
occipital lobe the most posterior portion of each cerebral hemisphere, forming a small part of its posterolateral surface. See illustration.
The occipital lobe of the brain. From Applegate, 2000.
parietal lobe the upper central portion of the gray matter of each cerebral hemisphere, between the frontal lobe and the occipital lobe and above the temporal lobe. It is the receptive area for fine sensory stimuli, and the highest integration and coordination of sensory information is carried on here. Damage to it can produce defects in vision or aphasia.
polyalveolar lobe a congenital disorder characterized in early infancy by the presence of far more than the normal number of alveoli in a lobe of the lungs; thereafter, normal multiplication of alveoli does not take place and they become enlarged, i.e., emphysematous.
quadrate lobe
2. a small lobe of the liver, between the gallbladder on the right, and the left lobe.
Riedel's lobe an anomalous tongue-shaped mass of tissue projecting from the right lobe of the liver in some individuals.
spigelian lobe caudate lobe.
temporal lobe a long tongue-shaped process that is the lower lateral portion of each cerebral hemisphere.

oc·cip·i·tal lobe of cer·e·brum

[TA]
the posterior, somewhat pyramid-shaped part of each cerebral hemisphere, demarcated by no distinct surface markings on the lateral convexity of the hemisphere from the parietal and temporal lobes, but sharply delineated from the parietal lobe by the parietooccipital sulcus on the medial surface.
Synonym(s): lobus occipitalis [TA], occipital lobe [TA]

occipital lobe

n.
The posterior lobe of each cerebral hemisphere, having the shape of a three-sided pyramid and containing the visual center of the brain.

occipital lobe

one of the five lobes of each cerebral hemisphere, occupying a relatively small pyramidal part of the occipital pole. The occipital lobe lies beneath the occipital bone and presents medial, lateral, and inferior surfaces. Compare central lobe, frontal lobe, parietal lobe, temporal lobe.

occipital lobe

The rear lobe of the main brain (cerebral hemisphere). The occipital lobe is concerned with vision.

occipital lobe

the posterior area of the CEREBRAL HEMISPHERE lying behind the parietal lobe and responsible for the interpretation of visual stimuli from the retina.

lobe, occipital

Portion of each cerebral hemisphere posterior to the parietal lobe where visual information is received and processing begins. See visual area.

lobe

1. a more or less well-defined portion of an organ or gland.
2. one of the main divisions of a tooth crown.

caudate lobe
a small dorsally located lobe of the liver to the right of the caudal vena cava that frequently embraces the right kidney.
ear lobe
an elevated area of skin just below the external auditory meatus in birds.
frontal lobe
the anterior portion of the gray matter of the cerebral hemisphere.
hepatic lobe
one of the lobes of the liver.
occipital lobe
the most posterior portion of the cerebral hemisphere, forming a small part of its dorsolateral surface.
parietal lobe
the upper central portion of the gray matter of the cerebral hemisphere, between the frontal and occipital lobes, and above the temporal lobe. See also parietal lobe.
prefrontal lobe
the part of the brain rostral to the ascending convolution.
quadrate lobe
1. precuneus.
2. a small lobe of the liver, between the gallbladder on the right, and the left lobe.
temporal lobe
the lower lateral portion of the cerebral hemisphere.

occipital

pertaining to the occiput; located near the occipital bone, as the occipital lobe.

occipital bone
the unpaired bone constituting the back and part of the base of the skull. See also Table 10.
occipital crest
see external occipital crest.
occipital fracture
see basisphenoid fracture.
occipital lobe
see occipital lobe.
occipital somites
the most anterior of the embryo's somites; they are the origin of the occipital cartilages of the skull.
References in periodicals archive ?
The brain MRI performed five months after anti-epileptic treatment showed that edema had regressed; however, hemorrhage was observed in the subcortical white matter of the bilateral frontal lobes and right posterior parietal and left occipital lobes on gradient-echo images.
The following case report describes a patient with occipital lobe infarction and CVH and provides radiographic evidence for the cortical release theory by reporting increased uptake in the right temporal lobe on the brain Tc SPECT (technetium single-photon emission computed tomography) scan.
3) The underlying cause is most commonly Alzheimer's disease (AD), (3,4) but it is not known why the parietal and occipital lobes are the main target of the disease in these patients.
Their data suggest that the development of dementia in PD may also be associated with frontal lobe atrophy on MRI, with extension of hypometabolism on FDG-PET beyond the occipital lobe into the frontal lobe, and even through more diffuse brain areas, such as the deep brain structures.
A shape that could work for you would be one that has had all the weight removed from below the occipital lobe (the prominent bone on the back of your head).
There was a significant difference in pre- and post-treatment rCBF values in the left temporal lobe, left temporo-occipital lobe, left basal ganglion, left thalamus, right temporal lobe, right occipital lobe, right thalamus, and right basal ganglion.
An MRI of the infant's brain showed severe cerebral abnormalities, including severe bilateral white-matter loss in the temporal and occipital lobe, consistent with focal cerebral destruction.
14] Herein, we report a PNET of the occipital lobe that showed extensive adipose tissue and glial differentiation.
A CT scan at this time demonstrated an increase in the mass effect and edema which now involved the right occipital lobe (Figs 3A, 3B).
In a group of 41 healthy volunteers, the same comparison revealed more frontal lobe fibers among males and more occipital lobe fibers among females, according to Henry A.
Multiple acute infarcts in the right anterior and posterosuperior cerebellar hemisphere and the left occipital lobe indicated that also other arteries originating from the vertebro-basilary blood supply were involved in this event.