(a.) Bearing or conducting inwards to a part or organ; -- opposed to efferent; as, afferent vessels; afferent nerves, which convey sensations from the external organs to the brain.
Example Sentences:
(1) The present study was designed to test the hypothesis that the decreased Epi response following ET was due to 1) depletion of adrenal Epi content such that adrenomedullary stimulation would not release Epi, 2) decreased Epi release with direct stimulation, i.e., desensitization of release, or 3) decreased afferent signals generated by ET itself.
(2) In the caudal spinal trigeminal nucleus (Vc), the collaterals of one half of the periodontium afferent fibers terminated mainly in lamina V at the rostral and middle levels of Vc.
(3) Electrical stimulation of afferent pathways at intensities just below threshold for eliciting action potentials resulted in a dramatic decrease in JSCP threshold.
(4) The perforant pathway and fimbria fornix were transected to label afferent fibers to NPY-positive cells.
(5) The primary afferent fibers diverge in the brainstem into a short ascending and a long descending tract.
(6) (1) Microdissection of an isolated afferent artery with or without macula densa (MD) has revealed that renin release is regulated by NaCl exposure to MD.
(7) The present study delimits the relationship of primary trigeminal afferents to their targets, the brainstem trigeminal nuclei of the neonatal rat.
(8) Investigations in normal subjects demonstrate that the LLR is a reflex mediated by fast conducting muscle and cutaneous afferents.
(9) All endings were electrotonically coupled to the M-cell, but impulses in less than 20% of the afferents produced chemically mediated excitatory postsynaptic potentials as well.
(10) These results show the existence of a depressor response and decreases in HR and RNA in the rabbit mediated by the action of BK on cardiac sympathetic afferents.
(11) In anesthetized cats, the enhancement of sympathetic activity and increase of the blood pressure in exclusion of afferents (section of vagosympathetic trunks and clamping of common carotid arteries) as well as the disappearance of the activity in enhanced afferentation, were shown to be transient and to disappear within a few minutes-scores of minutes in spite of the going on deafferentation or enhancement of afferentation.
(12) From these experiments it is concluded that vascular A1 and A2 adenosine receptors are present in the kidney and that activation of A1 receptors is associated with preglomerular vasoconstriction only, whereas activation of A2 receptors mediates pre- and postglomerular vasodilation with a lack of vasodilatory response of the distal afferent arteriole.
(13) By modifying the spatial distribution of afferents to the network, we demonstrate that the same basic model functions properly in spite of afferents with nonuniform background firing rates.
(14) The results indicate that stimulation of trigeminal subnucleus caudalis, a brain stem region that processes nociceptor afferent information, evokes a prompt increase in plasma ACTH.
(15) The pattern of innervation following transplantation indicates that, in repopulating dopamine-deficient cortical areas of recipient weaver mutants, graft-derived dopamine fibres show a preference for those layers which are normally invested by dopamine afferents.
(16) When afferent impulses were recorded from this fine nerve simultaneously with the blood pressure, two kinds of activity were observed.
(17) The organization of the afferent and efferent connections of the sagittal Zones A and B of the cerebellar cortex of the rat have been studied using wheat-germ agglutinin conjugated to horseradish peroxidase as a tracer.
(18) The tidal volume increase under CO2 inhalation was suppressed by the inflation reflex but other afferent vagal nerves seemed to be closely associated with the increased respiratory rate.
(19) Although many of these centrally observed alterations can be attributed to altered peripheral projections in axotomized V primary afferents, others must reflect central reorganization.
(20) The amount of spinal visceral afferences is relatively small (only 1.5-2.5% of all somatic spinal afferences).
Centripetal
Definition:
(a.) Tending, or causing, to approach the center.
(a.) Expanding first at the base of the inflorescence, and proceeding in order towards the summit.
(a.) Having the radicle turned toward the axis of the fruit, as some embryos.
(a.) Progressing by changes from the exterior of a thing toward its center; as, the centripetal calcification of a bone.
Example Sentences:
(1) Abducting saccades, which were slightly hypometric, displayed a marked postsaccadic centripetal drift.
(2) The study shows 3 groups of AN families, centripetal (53%), centrifugal (24%) and mixed (24%), supporting a hypothesis that AN families are a heterogeneous group.
(3) In these subjects, the centripetal reorientation of the platelet granules, which may be early structural changes of the release reaction, failed to occur.
(4) The direction of the arterial blood flow in the mature animal is predominantly centrifugal, while the venous drainage is centripetal.
(5) The responses obtained from circular muscle originating from either the centripetal or centrifugal gyri of the ascending colon did not differ significantly.
(6) The regenerative phase consists of centripetal cellular regeneration, cellular repair and some residual damage.
(7) The mechanisms involved in the selective degeneration of centrifugal and centripetal optic fibers is discussed.
(8) In addition, they suggest that migration is an important aspect of the regeneration response in the free graft system and permits the myogenic population to contribute en masse to the centripetal wave of regeneration from the time it is initiated at the muscle periphery.
(9) In both cases the spreading involves the peripheral actin cortex and is accompanied by a continual centripetal movement of surface components--a "membrane flow"--which continues even after spreading is completed.
(10) The concept of centripetal and centrifugal modes constructively links the illness life cycle to the individual and family life cycles.
(11) Four images were retained, and were graded 0 (absence) or 1 (presence): hypodensity before injection of the contrast material, arteriolar halo after injection, progressive centripetal filling and late hyperdensity.
(12) Certain head and neck malignancies tend to invade branches of the cranial nerves and progress centripetally.
(13) These data exhibit a highly negative selection intensity and selective mortality at the lower and higher birth weights than at intermediate weights, an example of stabilizing or centripetal natural selection.
(14) Activated regions of caged resorufin (CR)-labeled actin in lamellipodia of IMR 90 and MC7 3T3 fibroblasts were observed to move centripetally over time.
(15) In immunolight microscopy, NFPs (neurofilament proteins) are confined to the centripetal domain.
(16) On the other hand, dendrites of starburst amacrine cells process information electrotonically with a bias towards the centrifugal direction and for a restricted range of membrane resistance values the voltage attenuation in the centripetal direction suggests that the action of these dendrites can be confined locally.
(17) In contrast the negativity preceded centripetal saccades by only 500 msec, and its peak amplitude was smaller (4.6 microV).
(18) The boot can exert continuous centripetal pressure on both sides of the calcaneus to control transverse displacement and to maintain the normal height of the heel.
(19) Muscularization appears to occur in a centripetal direction and is apparent in the caudate at approximately 30 weeks' gestation.
(20) There was one localized area of apparent centripetal accumulation of contrast medium.