| lamina propria of saemicircular duct | The meshwork of connective tissue fibres between the saemicircular duct and the bony saemicircular canal; it encloses the perilymph in its spaces. Synonym: membrana propria ductus saemicircularis. (05 Mar 2000) |
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| lamina quadrigemina | The roofplate of the mesencephalon formed by the quadrigeminal bodies. Synonym: lamina tecti mesencephali, tectum mesencephali, lamina quadrigemina, quadrigeminal lamina, quadrigeminal plate. (05 Mar 2000) |
| lamina rara | The relatively electron-lucent layer on either side of the lamina densa of the basement membrane. (05 Mar 2000) |
| lamina rostralis | A whitish line appearing on perfectly median sections of the brain as a thin bridge connecting the rostrum of the corpus callosum with the lamina terminalis; the rostral lamina contains no commissural fibres; instead, it corresponds to the line along which the pia mater reflects from the medial surface of one hemisphere to that of the other. Synonym: lamina rostralis, rostral layer, teniola corporis callosi. (05 Mar 2000) |
| lamina septi pellucidi | One of the two thin layers of the transparent septum, which extend from the corpus callosum to the fornix; often separated from each other by a space, the cavity of septum pellucidum. Synonym: lamina septi pellucidi. (05 Mar 2000) |
| lamina spiralis ossea | A double plate of bone winding spirally around the modiolus dividing the spiral canal of the cochlea incompletely into two, scala tympani and scala vestibuli; between the two plates of this lamina the fibres of the cochlear nerve reach the spiral organ (of Corti). Synonym: lamina spiralis ossea, spiral plate. (05 Mar 2000) |
| lamina spiralis secundaria | A ridge on the outer wall of the first turn of the cochlea opposite the spiral lamina. Synonym: lamina spiralis secundaria, secondary spiral plate. (05 Mar 2000) |
| lamina superficialis | In a stratified structure, the outermost or topmost of the strata; the stratum nearest the surface. See: superficial layer of deep cervical fascia, superficial layer of the levator {palpebrae superioris muscle}, superficial layer of temporalis fascia. Synonym: lamina superficialis, superficial lamina. (05 Mar 2000) |
| lamina superficialis fasciae cervicalis | The part of the cervical fascia investing the sternocleidomastoid and trapezius muscles and completely encircling the neck. Synonym: lamina superficialis fasciae cervicalis, investing fascia, superficial layer of deep cervical fascia. (05 Mar 2000) |
| lamina superficialis fasciae temporalis | The superficial part of the temporal fascia attaching to the lateral surface of the zygomatic arch. Synonym: lamina superficialis fasciae temporalis. (05 Mar 2000) |
| lamina superficialis musculi levatoris palpebrae superioris | <anatomy> The superficial fibres of the levator muscle of the superior eyelid which are inserted into the skin of the superior eyelid. Synonym: lamina superficialis musculi levatoris palpebrae superioris. (05 Mar 2000) |
| lamina suprachoroidea | A layer of loose, pigmented connective tissue on the outer surface of the choroid, resembling and attached to the lamina fusca sclerae. Synonym: lamina suprachoroidea, ectochoroidea, suprachoroid layer, suprachoroidea. (05 Mar 2000) |
| lamina supraneuroporica | That part of the choroid membrane of the third ventricle that forms the roof of the foramen of Monro. (05 Mar 2000) |
| lamina tecti mesencephali | The roofplate of the mesencephalon formed by the quadrigeminal bodies. Synonym: lamina tecti mesencephali, tectum mesencephali, lamina quadrigemina, quadrigeminal lamina, quadrigeminal plate. (05 Mar 2000) |
| lamina terminalis cerebri | A thin plate passing upward from the optic chiasm and forming the rostral boundary of the third ventricle; membrane closing the rostral neuropore. Synonym: lamina terminalis cerebri, lamina cinerea, terminal plate, velum terminale. (05 Mar 2000) |