Area is a distinct part of a surface or space.
aortic a. Area on the chest over the cartilage of the second right rib.
apical a. Area about The tip of the root of a tooth. The apex of a lung. The chest wall corresponding to the apex of the heart.
auditory a. Region of the cerebral cortex concerned with hearing, occupying the transverse temporal gyri and the superior temporal gyrus.
Broca’s speech a. Area comprising the triangular and opercular portions of the inferior
frontal gyrus; it governs the motor aspects of speech.
Brodmann’s a.’s The 47 areas of the cerebral cortex mapped out according to the arrangement of their cellular components.
a. of cardiac dullness Normally a small triangular area on the lower left side of the sternum which, on percussion of the chest, produces a dull sound; it corresponds to the portion of the heart not covered by lung tissue.
a. cribrosa Area of the renal papilla containing 20 or more pores through which the urine oozes into the minor calyces.
frontal a. Portion of the cerebral cortex in front of the central sulcus.
Little’s a. A highly vascular area of the anterior portion of the nasal septum; frequent site of nose-bleed.
macular a. The part of the retina that contains a yellow pigment, is used for central vision, and appears to be free of vessels when viewed with an ophthalmoscope.
mirror a. The reflecting surface of the lens of the eye and the cornea when illuminated with the slit lamp.
mitral a. The chest area over the apex of the heart where the sound produced by the left atrioventricular valve is usually heard most clearly.
motor a. Portion of the cerebral cortex composed of the anterior wall of the central sulcus and adjacent portions of the precentral gyrus; its stimulation
with electrodes causes contraction of voluntary muscles.
postcentral a., postrolandic a. The sensory area of the cerebral cortex, just posterior
to the central sulcus; it receives sensory stimuli from the whole body.
premotor a. Area immediately in front of the motor area, concerned with integrated movements.
pulmonic a. Area of the chest at the second left intercostal space where flow sounds across the pulmonary valves are usually heard best.
skip a.’s Areas of the intestinal lining that are relatively uninvolved in the process of Crohn’s disease.
subcallosal a. An area of the cortex in the medial aspect of each cerebral hemisphere, located immediately in front of the lamina terminalis and caudoventral to the subcallosal gyrus.
tricuspid a. Area of auscultation for murmurs originating from the right atrioventricular valve; the lower left sternal area.
visual a. Area of the occipital lobe of the cerebral cortex concerned with vision;
consists of two parts. Sensory or striate part, occupies the walls of the calcarine sulcus ; concerned with recognition of size, form, motion, color, illumination, and transparency. Psychic or parastriate part, surrounds the sensory portion; associates visual impressions and past experiences for recognition and identification.