What's the difference between axis and postaxial?

Axis


Definition:

  • (n.) The spotted deer (Cervus axis or Axis maculata) of India, where it is called hog deer and parrah (Moorish name).
  • (n.) A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are symmetrically arranged.
  • (n.) A straight line with respect to which the different parts of a magnitude are symmetrically arranged; as, the axis of a cylinder, i. e., the axis of a cone, that is, the straight line joining the vertex and the center of the base; the axis of a circle, any straight line passing through the center.
  • (n.) The stem; the central part, or longitudinal support, on which organs or parts are arranged; the central line of any body.
  • (n.) The second vertebra of the neck, or vertebra dentata.
  • (n.) Also used of the body only of the vertebra, which is prolonged anteriorly within the foramen of the first vertebra or atlas, so as to form the odontoid process or peg which serves as a pivot for the atlas and head to turn upon.
  • (n.) One of several imaginary lines, assumed in describing the position of the planes by which a crystal is bounded.
  • (n.) The primary or secondary central line of any design.

Example Sentences:

  • (1) The dependence of fluorescence polarization of stained nerve fibres on the angle between the fibre axis and electrical vector of exciting light (azimuth characteristics) has been considered.
  • (2) Typically the iron-iron axis (gz) of the binuclear iron-sulfur clusters is in the membrane plane.
  • (3) The results clearly show that the acute hyperthermia of unrestrained rats induced by either peripheral or central injections of morphine is not caused by activation of the pituitary-adrenal axis.
  • (4) In this study, pinealectomy did not alter the inhibitory effect of testosterone on neuroendocine-gonadal activity in the male rat, suggesting that the pineal gland does not mediate the response of the rat hypothalamic-pituitary axis to testosterone.
  • (5) The bundles may lie parallel to the plasma membrane and to the long axis of the cell.
  • (6) The first experiment gave good results, although only one participant had any previous experience of hinge axis location, and it is debatable whether or not this experience is necessary before satisfactory results can be obtained.
  • (7) For consistent identification of the normal pancreas, preliminary longitudinal scanning at, or near, the mid-line and subsequent oblique scanning in the long axis are necessary prerequisites in delineating the anatomic outline of the pancreas.
  • (8) We attribute the greater strength of the step-cut repair to the additional number of epitendinous loops, which lie perpendicular to the long axis of the tendon.
  • (9) 3-D curves were computed with an apparent rotation around the vertical axis Z.
  • (10) In cancer of the pancreas head, cancer cells could invade the portal vein and perineural space of the celiac plexus, and metastasize to regional lymph nodes around the celiac axis.
  • (11) Subsequently, due to the rotation of the original polar axis in one hemisphere, the third cleavage plane through one half of the egg is transverse to the third cleavage plane through the other half.
  • (12) These activities define both the polarity of the anterior-posterior (AP) axis and the spatial domains of expression of the zygotic gap genes, which in turn control the subsequent steps in segmentation.
  • (13) In addition, FSH and LH were low or normal in the presence of low testosterone levels, suggesting that the hypothalamic pituitary gonadal axis is impaired.
  • (14) Dioptric aniseikonia was calculated between 1 month and 24 months after surgery (with Gruber's and Huber's computer program) on the basis of most recently obtained values (bulb axis length, depth of the anterior chamber, lens thickness, necessary refraction), and compared with subjective measurements taken with the phase difference haploscope.
  • (15) The first axis embraoes the genotypic period, the second the effects of etioepigenetic factors, and the third the formation of psychopathologic (neurotic or psychiatric) syndromes.
  • (16) This study shows that the presence of pancreatic juice in the duodenal lumen enhances the fat-stimulated release of enteric hormones that have a stimulatory action on the enteroacinar and enteroinsular axis as well as an inhibitory action (enterogastrone-like activity) on the postprandial regulation of gastric function.
  • (17) Thus, Hox-1.6 is involved in regional specification along the rostrocaudal axis, but only in its most rostral domain of expression.
  • (18) We conclude from this study that there is little or no seasonal photoperiodic entrainment of the antler and testicular cycles of males in this population of axis deer.
  • (19) In the cis-trans axis of the Golgi apparatus the following compartments were observed: (a) On the cis face there was a continuous osmiophilic tubular network referred to as the cis element; (b) a cis compartment composed of 3 or 4 NADPase-positive saccules perforated with pores in register forming wells that contained small vesicles; (c) a trans compartment composed of 1 or 2 TPPAse-positive elements underlying the NADPase ones, followed by 1 or 2 CMPase-positive elements that showed a flattened saccular part continuous with a network of anastomotic tubules.
  • (20) To meet these prerequisites we have introduced some technical refinements: (1) computer-controlled rectilinear translations of the target in combination with different angular positions of the source and (2) computer-controlled rotations of the target around a vertical axis in combination with different angular positions of the source.

Postaxial


Definition:

  • (a.) Situated behind any transverse axis in the body of an animal; caudal; posterior; especially, behind, or on the caudal or posterior (that is, ulnar or fibular) side of, the axis of a vertebrate limb.

Example Sentences:

  • (1) The Greig cephalopolysyndactyly syndrome is an uncommon dysmorphic syndrome characterized by preaxial and postaxial polysyndactyly and minor craniofacial anomalies.
  • (2) The observations gathered in mouse embryos collected 4, 24 and 48 hours after the administration of a teratogenic doses of acetazolamide to their pregnant mothers strongly suggest that the resulting postaxial defects in the anterior limbs can be the result of a selective perturbation of the inductive process responsible for the genesis of the apical ectodermal ridge, probably secondary to a transient acidosis.
  • (3) A new "postaxial polydactyly-progressive myopia" syndrome of autosomal dominant inheritance is delineated on the basis of nine affected persons in four generations of one family.
  • (4) This maps Hox-1 and Hox-1.7 close to two mouse loci that affect morphogenesis, postaxial hemimelia (px) and hypodactyly (Hd).
  • (5) Eleven patients with hypoplasia and partial or complete aplasia of the ulna (examples of a complex spectrum of postaxial forearm and hand abnormalities) were reviewed.
  • (6) The triad of the syndrome consists of occipital encephalocele, polycystic kidneys and postaxial polydactyly.
  • (7) Independent of the degree and location (pre- or postaxial) of the anomaly the creation of one single unit, which corresponds to the functional as well as to the cosmetical demands is the main purpose of the operative correction.
  • (8) Ectrodactyly induced by ethanol was primarily of the forelimb and exclusively postaxial.
  • (9) Clinical and genetic aspects of the postaxial acrofacial dysostoses are discussed.
  • (10) The postaxial region with the hypoplastic AER became defective.
  • (11) We report mother and son with the ulnar-mammary syndrome type Pallister: both had postaxial polydactyly in one upper limb and absence or hypoplasia of the axillary apocrine glands bilaterally.
  • (12) These disorders have generally been separated on the basis of their limb anomalies into preaxial, postaxial, lethal, and atypical types.
  • (13) In addition to facial changes strikingly similar to that of the Teacher-Collins syndrome and a cleft soft and hard palate, symmetrical postaxial limb deficiencies with absence of the fifth digital rays in both the upper and lower limbs were present.
  • (14) Male and female second cousins with short limbs, postaxial polydactyly and cardiac malformations are described.
  • (15) There was also postaxial polydactyly, flexion contractures of the digits, hypotonia, and a congenital heart anomaly.
  • (16) Postaxial ectrodactyly was more frequent in the forepaws, and sidedness was not significant.
  • (17) Postaxial deficiencies observed in 12-15-day embryos and affecting preferentially the right forelimbs were classified in nine morphological types according to increasing amounts of missing parts.
  • (18) All cases of both preaxial and postaxial (polyaxial) polydactyly were inherited and bilateral.
  • (19) Laryngeal cleft may be a component manifestation of several syndromes, eg, the G syndrome, and the Pallister-Hall syndrome of congenital hypothalamic hamartoblastoma, hypopituitarism, imperforate anus, and postaxial polydactyly.
  • (20) Postaxial polydactyly was predominently right sided and mostly involved the forepaws.

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