frontal lobe

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Related to Frontal lobes: frontal cortex, amygdala, limbic system, Temporal lobes, parietal lobes, Occipital lobes

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.

fron·tal lobe of cer·e·brum

[TA]
the portion of each cerebral hemisphere anterior to the central sulcus.
Synonym(s): frontal lobe [TA], lobus frontalis [TA]

frontal lobe

n.
The largest and most anterior part of each cerebral hemisphere.

frontal lobe

the largest of five lobes constituting each of the two cerebral hemispheres. It lies beneath the frontal bone; occupies part of the lateral, medial, and inferior surfaces of each hemisphere; and extends posteriorly to the central sulcus and inferiorly to the lateral fissure. It is responsible for voluntary control over most skeletal muscles. The frontal lobe significantly influences personality and is associated with the higher mental activities, such as planning, judgment, emotion, and conceptualization. Compare central lobe, occipital lobe, parietal lobe, temporal lobe.

frontal lobe

The large, foremost part of the brain. This part constitutes about one-third of the brain and is much more fully developed than in any other primate. Damage to the frontal lobe causes general disturbance of thinking, impairment of initiative and spontaneity, loss of strength of personality, and, if the rear part of the lobe is affected, paralysis.

frontal lobe

the anterior part of each cerebral hemisphere in mammals.

Frontal lobe

The largest, most forward-facing part of each side or hemisphere of the brain.
Mentioned in: Aphasia

frontal lobe,

n the largest of five lobes constituting each of the two cerebral hemispheres. The frontal lobe lies beneath the frontal bone. The frontal lobe significantly influences personality and is associated with the higher mental activities, such as planning, judgment, and conceptualizing.

frontal

1. pertaining to the face and forehead.
2. denoting a plane passing through the body from side to side. In quadrupeds it is synonymous with a transverse plane while in bipeds it is synonymous with a coronal plane.

frontal abscess
in cattle usually results from infection of a dehorning wound, in sheep from infection by Oestrus ovis.
frontal bone
the paired bones constituting the upper part of the face. See also Table 10.
frontal lobe
the rostral (anterior) portion of the cerebral hemisphere.
frontal nerve block
see supraorbital nerve block.
frontal plane
see dorsal plane.
frontal process
see comb.
frontal sinus
see frontal sinus.
frontal sinusitis
inflammation of the frontal sinus; commonly a sequel to infection of a dehorning wound. Occurs as a chronic disease of unknown origin in bighorn sheep running at range in the wild.

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.
References in periodicals archive ?
Human frontal lobes are exactly the size expected for a non-human brain scaled up to human size.
Lead author Professor Robert Barton from the Department of Anthropology at Durham University, said: "Probably the most widespread assumption about how the human brain evolved is that size increase was concentrated in the frontal lobes.
They used that data to map brain activity in nearly 350 people with damage, or lesions, in their frontal lobes.
The frontal lobes enable us to make all of our reflexes, things we do without thinking.
But the frontal lobes operate best as part of a highly distributed, interactive structure with much autonomy and many degrees of freedom.
A repeat CT scan showed a lesion in the right frontal lobe and diffuse cerebral edema (Figure 1A).
Marie examined Tans brain and argued that the lesion was not limited to the frontal lobe, but also involved the parietotemporal region.
The task assesses general neuropsychological functioning not associated with the frontal lobes.
The study concluded that smoking exacerbates alcohol-related frontal lobe neuronal injury and cell membrane damage, but also has an independent adverse effect on subcortical structures.
When the volunteers completed one task at a time, one side of a certain area of the frontal lobes lit up.
In a study of 44 healthy adolescents, the teens who played violent video games demonstrated less activation in the frontal lobes associated with inhibition, concentration, and self-control, and more activation in the amygdala, which governs emotional arousal, Dr.