| IMA | Industrial Medical Association; inferior mesenteric artery; Interchurch Medical Assistance; internal... |
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| IMAB | internal mammary artery bypass |
| IMAI | internal mammary artery implant |
| IMG | inferior mesenteric ganglion; internal medicine group [practice]; international medical graduate |
| IMM | inhibitor-containing minimal medium; internal medial malleolus |
| carpal canal | The passageway deep to the transverse carpal ligament between tubercles of the scaphoid and trapezoid bones on the radial side and the pisiform and hook of the hamate on the ulnar side, through which the median nerve and the flexor tendons of the fingers and thumb pass; compression of the median nerve may occur here (carpal tunnel syndrome). Synonym: canalis carpi, carpal canal. (05 Mar 2000) |
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| vesicourethral canal | The cranial portion of the primitive urogenital sinus from which develop the urinary bladder and part of the urethra. (05 Mar 2000) |
| vestibular canal | The division of the spiral canal of the cochlea lying on the apical side of the spiral lamina and vestibular membrane. Synonym: vestibular canal. (05 Mar 2000) |
| vidian canal | An opening through the base of the medial pterygoid process of the sphenoid bone through which pass the artery, vein, and nerve of the pterygoid canal. Synonym: canalis pterygoideus, vidian canal. (05 Mar 2000) |
| caudal canal | The space occupied by the sacral extension of the epidural space. (05 Mar 2000) |
| parturient canal | Cavity of the uterus and vagina through which the foetus passes. Synonym: parturient canal. (05 Mar 2000) |
| medial crus of facial canal | Medially-placed, anteriorly-directed first portion of the horizontal part of the facial canal. See: horizontal part of facial canal. Synonym: medial crus of the horizontal part of the facial canal. (05 Mar 2000) |
| medial crus of the horizontal part of the facial canal | Medially-placed, anteriorly-directed first portion of the horizontal part of the facial canal. See: horizontal part of facial canal. Synonym: medial crus of the horizontal part of the facial canal. (05 Mar 2000) |
| central canal | The ependyma-lined lumen (cavity) of the neural tube, the cerebral part of which remains patent to form the ventricles of the brain, while the spinal part in the adult often is reduced to a solid strand of modified ependyma. Synonym: canalis centralis medullae spinalis, central canal of spinal cord, tubus medullaris. Synonym: syringocele. (05 Mar 2000) |
| central canal of spinal cord | The ependyma-lined lumen (cavity) of the neural tube, the cerebral part of which remains patent to form the ventricles of the brain, while the spinal part in the adult often is reduced to a solid strand of modified ependyma. Synonym: canalis centralis medullae spinalis, central canal of spinal cord, tubus medullaris. Synonym: syringocele. (05 Mar 2000) |
| central canal of the vitreous | A minute canal running through the vitreous from the discus nervi optici to the lens, containing in foetal life a prolongation of the central artery of the retina, the hyaloid artery. See: vitreous, hyaloid artery. Synonym: canalis hyaloideus, central canal of the vitreous, Cloquet's canal, Stilling's canal. (05 Mar 2000) |
| vomerine canal | An opening between the vaginal process of the sphenoid and the ala of the vomer on either side. It conveys a branch of the sphenopalatine artery. Synonym: canalis vomerovaginalis, basipharyngeal canal, vomerine canal. (05 Mar 2000) |
| vomerobasilar canal | A small canal between the superior border of the vomer and the rostrum of the sphenoidal bone. Synonym: canalis vomerorostralis, vomerobasilar canal. (05 Mar 2000) |
| vomerorostral canal | A small canal between the superior border of the vomer and the rostrum of the sphenoidal bone. Synonym: canalis vomerorostralis, vomerobasilar canal. (05 Mar 2000) |
| vomerovaginal canal | An opening between the vaginal process of the sphenoid and the ala of the vomer on either side. It conveys a branch of the sphenopalatine artery. Synonym: canalis vomerovaginalis, basipharyngeal canal, vomerine canal. (05 Mar 2000) |