commissure

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commissure

 [kom´ĭ-shūr]
1. a site of union of corresponding parts, such as the angle of the lips or eyelids.
2. the site of junction between adjacent cusps of a cardiac valve.
anterior commissure the band of fibers connecting the parts of the two cerebral hemispheres.
commissure of epithalamus a large fiber bundle that crosses the midline of the epithalamus just dorsal to the point where the cerebral aqueduct opens into the third ventricle.
middle commissure a band of gray matter joining the optic thalami; it develops as a secondary adhesion and may be absent.
posterior commissure commissure of epithalamus.

com·mis·sure

(kom'i-shūr), [TA]
1. Angle or corner of the eye, lips, or labia.
2. A bundle of nerve fibers passing from one side in the brain or spinal cord to the other.
Synonym(s): commissura [TA]

commissure

(kŏm′ə-sho͝or′)
n.
1. A line or place at which two things are joined.
2. Anatomy
a. A tract of nerve fibers passing from one side to the other of the spinal cord or brain.
b. The point or surface where two parts, such as the eyelids, lips, or cardiac valves, join or form a connection.
3. Botany The surface or place along which two structures, such as carpels, are joined.

com′mis·su′ral adj.

com·mis·sure

(kom'i-shŭr) [TA]
1. Angle or corner of the eye, lips, or labia.
2. A bundle of nerve fibers passing from one side to the other in the brain or spinal cord.
Synonym(s): commissura [TA] .

commissure

1. A line or point at which two things are joined.
2. A nerve fibre bundle passing from one side of the brain or spinal cord to the other to connect similar structures.

commissure 

Band of nerve fibres connecting corresponding structures in the brain or spinal cord. See corpus callosum.

com·mis·sure

(kom'i-shŭr) [TA]
1. Angle or corner of the eye, lips, or labia.
2. A bundle of nerve fibers passing from one side in the brain or spinal cord to the other.
References in periodicals archive ?
The researchers reported that the average distance of the right sinus commissure was measured as 18.8 mm, and those of the non- and left coronary sinuses as 17.4 and 15.2 mm, respectively (7-10).
A second pedal ganglion neuron (e2, posterior to el) and the ventral commissure are faintly visible in this embryo.
In the buccal ganglia, a symmetrical pair of GLU-LIR cell clusters, each consisting of 4-6 neurons of 20-30 [micro]m, were located in a caudo-medial position near the cerebro-buccal commissure (Figs.
Visual inspection of the valves did not reveal fusion of the commissures. All resected mitral valves had evidence of end-stage rheumatic valvular disease, such as severe fibrosis and calcification.
FMRFamide-LIR fibers extended ventrally from the apical commissure toward the foot.
The cerebral ganglia are connected by a long dorsal commissure known as inter-cerebral which passes over the esophagus, they have rectangular shape and are located parallel to the mouth close to the area where the lip palps originate.
Although it was assumed that the measurement from menton to the labial commissure was a vertical measurement, it also has a horizontal component.
Proximally the aorta is transected a few millimeters above the valve commissures and distally 2 to 3 cm proximal to the innominate artery.
It can present as beefy red erythematous plaques on the buttocks, lower abdomen, thighs, or in intertriginous areas or oral commissures. A hallmark sign is pinpoint pustulovesicular satellite lesions.
When choosing among these techniques, one must consider the size of the defect, the availability of adjacent tissue, and involvement of the commissures. Lower lip defects can be broken down into three groups: involvement of one-third, one-third to two-thirds, and more than two-thirds of the lip.
Although the commissures move up and laterally in smiling, studies have shown a difference in the amount and direction of movement between the right and left sides.
The ascending aorta was transversally sectioned approximately 2 cm above the commissures of the aortic leaflets.