What's the difference between canal and neuropore?
Canal
Definition:
(n.) An artificial channel filled with water and designed for navigation, or for irrigating land, etc.
(n.) A tube or duct; as, the alimentary canal; the semicircular canals of the ear.
Example Sentences:
(1) In addition to the aqueduct other associated inner ear anomalies have been identified in 60% of this population including: enlarged vestibule (14); enlarged vestibule and lateral semicircular canal (7); enlarged vestibule and hypoplastic cochlea (4); and hypoplastic cochlea (4).
(2) After four years of existence, many evaluations were able to show the qualities of this system regarding root canal penetration, cleaning and shaping.
(3) Digestion is initiated in the gastric region by secretion of acid and pepsin; however, diversity of digestive enzymes is highest in the post-gastric alimentary canal with the greatest proteolytic activity in the spiral valve.
(4) A new theory for the peculiar site selection of cholesteatomas of the external auditory canal is postulated.
(5) In the anesthetized cat, the posterior canal nerve (PCN) was stimulated by electric pulses and synaptic responses were recorded intracellularly in the three antagonistic pairs of extraocular motoneurons.
(6) Two hundred and forty root canals of extracted single-rooted teeth were prepared to the same dimension, and Dentatus posts of equal size were cemented without screwing them into the dentine.
(7) 5 reconstructions of the posterior bony canal wall were moderately sunk in.
(8) The parameters of the air flow in the canal of the separator are established in a graphic way.
(9) It may be explained by an ipsilateral lesion of the posterior canal pathways.
(10) Interlamellar plasmodia are limited by 2 outer unit membranes which give rise to both single-and double-membraned pincytic canals.
(11) Ten patients have undergone abdominal proctocolectomy with the formation of an ileal reservoir anastomosed onto the anal canal using a stapling device.
(12) The hymen was not penetrated as a result of intromission and therefore the site of ejaculation would have been in the urogenital canal of the 4 primigravid elephants.
(13) The cytotoxic effects on cultured rat bone cells of newly-developed root canal sealers and commercially available sealers were compared.
(14) In the external ear canal, residual water from caloric testing or any other irrigation may act to simulate a conductive hearing loss and interfere with subsequent auditory brainstem response recording leading to increased latencies and reduced amplitudes.
(15) The surgeon must have an exact idea of this canal before undertaking operation for plastics of the hernial defect.
(16) All the canals open independently at the surface of the cuticle and the substance deposited there is a mixture of proteins and acid mucosubstances.
(17) The crossing points were investigated in 20 patients and in most cases they existed between 2 cm and 6 cm from the anterior border of the external auditory canal.
(18) It is concluded that the massive destruction of the normal anatomy in the lateral semicircular canal may be the morphological basis of a functional endolymphatic fistula for drainage of the endolymphatic hydrops.
(19) In the series of 50 acoustic neurinomas (AN) the internal auditory canal (IAC) diameter and the diameter difference between the tumor and non-tumor side are compared with the sizes of the AN.
(20) Myelography revealed no abnormality, although magnetic resonance imaging and computed tomography after myelography demonstrated a mass within the posterior aspect of the thoracic spinal canal associated with anterior displacement and compression of the spinal cord.
Neuropore
Definition:
(n.) An opening at either end of the embryonic neural canal.
Example Sentences:
(1) The progressive fusion of the neural folds during stage 10, and the closure of the rostral and caudal neuropores at stages 11 and 12, respectively, are detailed with further precision than hitherto.
(2) This eversion persisted in affected embryos through the time that the posterior neuropore should normally close.
(3) Considered together, the results provided evidence that embryonic conversion of APAP or 7-OH-AAF to the corresponding catechol metabolites may be instrumental in effecting the abnormal anterior neuropore closure observed after exposure of embryos to the respective parent compounds.
(4) Accumulation of hyaluronate and sulfated GAG was greatest in the posterior neuropore and decreased progressively toward the hindbrain where neurulation was already complete.
(5) The rostral neuropore closes towards the end of stage 11.
(6) Some occlusion of the lumen of the neural tube was noted in 4 embryos, all of which had an open rostral neuropore.
(7) And failure in closure of the posterior neuropore and disturbance in the development of the tail bud probably play major role in the morphogenesis of myeloschisis.
(8) The origin of this malformation is a failure of closure of the anterior neuropore which delays the ingrowth of the mesoderm that is destined to form the skull and dura beyond the 10th week of gestation, leaving behind trapped cerebral tissue.
(9) Whereas treatment with RA produced underdeveloped branchial arches, symmetrically cleft cranial defects resulting in openings in rhombencephalic and prosencephalic regions, and exteriorized neural tissue in the caudal neuropore region, VPA produced irregular clefts with wavy margins along the entire length of the neural tube, and an open caudal neuropore without eversion of the neuroepithelium, while producing no detectable effect on the branchial arches.
(10) This was well before closure of the posterior neuropore which occurred at the 21-somite stage.
(11) Finally, the caudal neuropore completely closed at the level of the caudal end of the future 33rd somite.
(12) Additions of 3-OH-APAP (0.1-0.2 mM) but not N-acetyl-p-benzoquinoneimine (NAPQI, 0.1-0.5 mM) to the culture medium elicited the typical neuropore abnormality.
(13) Microscopically, this embryonic failure appears to manifest itself between Hamburger-Hamilton stages 8 and 9 of development and is characterized by a series of retarded developmental processes: closure of the anterior neuropore, brain vesicle differentiation, somite formation, and cardiac development.
(14) Because rapid brain enlargement still occurs after reopening, occlusion probably functions principally in the initial phases of enlargement prior to closure of the posterior neuropore.
(15) The first fusion of the cranial neural folds took place in the occipital somite region, the second fusion in the diencephalic region, and the third at the end of the neural plate, thus leaving two neuropores in the cephalic region.
(16) These data indicate that the susceptible period for induction of these anomalies does not stop at neuropore closure.
(17) These included distortion of the neural folds at the level of the posterior neuropore, vascular damage and hematoma formation, malformation of the notochord, and abnormalities of secondary neurulation.
(18) The caudal end of the posterior neuropore closes dorsal to the developing tail bud.
(19) Numerous pleomorphic inclusions and a few apparently necrotic cells are present in areas bordering the anterior neuropore.
(20) The characteristic features of this stage are 21-29 pairs of somites, incipient or complete closure of the caudal neuropore, and the appearance of upper limb buds.