lamina

lamina, pl. laminae (lam´i-na, lam´i-ne) [NA]

Thin plate or flat layer. See also layer, stratum. [L]
l. affix´a [NA] that part of the medial ependymal wall of the lateral ventricle of the embryonic brain that in later development becomes adherent to the superior surface of the thalamus and thus comes to form the floor of the central part of the lateral ventricle; it covers the thalamostriate and choroidal veins.
l. ala´ris [NA] alar l. of neural tube
alar l. of neural tube the dorsal division of the lateral walls of the neural tube in the embryo; it gives rise to neurons relaying afferent impulses to higher centers; in the adult such neurons compose the sensory nuclei of the spinal cord and brainstem.l. alaris [NA], alar plate of neural tube, dorsolateral plate of neural tube, l. dorsalis, wing plate;
lam´inae al´bae cerebel´li [NA] layers of white substance seen on section of the cerebellum.laminae medullares cerebelli;
l. ante´rior vagi´nae mus´culi rec´ti abdo´minis [NA] anterior layer of rectus abdominis sheath
l. ar´cus ver´tebrae [NA] l. of vertebral arch
basal l. 1. an amorphous extracellular layer applied to the basal surface of epithelium and also investing muscle cells, fat cells, and Schwann cells; thought to be a selective filter and to serve both structural and morphogenetic functions. It is comprised of a 20-100 nm network of file filaments called the l. densa which appears dense in the electron microscope, and on either side of this layer is a less dense layer called the l. rarae; See also basement membrane, l. densa. 2. l. densa
basal l. of choroid l. basalis choroideae
basal l. of ciliary body the inner layer of the ciliary body, continuous with the basal layer of the choroid and supporting the pigment epithelium of the ciliary retina.l. basalis corporis ciliaris [NA], basal layer of ciliary body;
basal l. of cochlear basilar membrane
l. basa´lis [NA] basal l. of neural tube
l. basa´lis choroi´deae [NA] the transparent, nearly structureless inner layer of the choroid in contact with the pigmented layer of the retina.basal l. of choroid, basal layer of choroid, Bruch's membrane, Henle's membrane, l. vitrea, vitreous lamella, vitreous membrane (3);
l. basa´lis cor´poris cilia´ris [NA] basal l. of ciliary body
basal l. of neural tube the ventral division of the lateral walls of the neural tube in the embryo; it contains neuroblasts giving rise to somatic and visceral motor neurons.l. basalis [NA], basal plate of neural tube, l. ventralis, ventral plate of neural tube;
basal l. of semicircular duct basal membrane of semicircular duct
basement l. basement membrane
basilar l. basilar membrane
l. basila´ris coch´leae [NA] basilar membrane
boundary l. a basement membrane-like structure that invests muscle cells, fat cells, and Schwann cells. See also basement membrane, basal l.
l. cartilag´inis cricoi´deae [NA] l. of cricoid cartilage
l. cartilag´inis latera´lis tubae auditivae [NA] * official alternate term for lateral l. of cartilaginous auditory tube
l. cartilag´inis media´lis tubae auditivae [NA] * official alternate term for medial l. of cartilaginous auditory tube, medial l. of cartilaginous auditory tube
l. cartilag´inis thyroi´deae [NA] l. of thyroid cartilage
l. choriocapilla´ris choriocapillary layer
l. choroi´dea epithelial l
l. choroi´dea epithelia´lis epithelial l
l. choroidocapilla´ris [NA] choriocapillary layer
l. cine´rea l. terminalis of cerebrum
l. cribro´sa os´sis ethmoida´lis [NA] cribriform plate of ethmoid bone
l. cribro´sa scle´rae the portion of the sclera through which pass the fibers of the optic nerve.cribrous l., perforated layer of sclera;
cribrous l. l. cribrosa sclerae
l. of cricoid cartilage a quadrate plate forming the posterior part of the cricoid cartilage. It resembles the shield of a signet ring, the arch of the cricoid representing the remainder of the ring.l. cartilaginis cricoideae [NA];
deep l. deep layer
l. den´sa 1. the electron-dense layer of the basal l. as seen in the electron microscope; See also basement membrane. 2. the extraordinarily thick basal l. of the renal glomerulus.basal l. (2);
dental l. dental ledge
l. denta´ta vestibular labium of limbus of spiral lamina
dentogingival l. dental ledge
l. dorsa´lis alar l. of neural tube
l. du´ra the hard layer lining the dental alveoli.
l. elas´tica ante´rior anterior limiting layer of cornea
l. elas´tica poste´rior posterior limiting layer of cornea
elastic laminae of arteries 1) external: the layer of elastic connective tissue lying immediately outside the smooth muscle of the tunica media; 2) internal: a fenestrated layer of elastic tissue of the tunica intima.elastic layers of arteries, Henle's fenestrated elastic membrane;
episcleral l. the delicate moveable layer of loose connective tissue between the external surface of the sclera and the fascial sheath of the eyeball.l. episcleralis [NA];
l. episclera´lis [NA] episcleral l
epithelial l. the layer of modified ependymal cells that forms the inner layer of the tela choroidea, facing the ventricle.l. epithelialis [NA], epithelial choroid layer, l. choroidea epithelialis, l. choroidea;
l. epithelia´lis [NA] epithelial l
l. exter´na cra´nii [NA] outer table of skull
l. fibrocartilagin´ea interpu´bica interpubic disc
l. fibroreticula´ris a layer of the basement membrane in continuity with associated connective tissue; it is often discontinuous and may be lacking entirely in some cases.
l. fusca of sclera an exceedingly delicate layer of loose, pigmented connective tissue on the inner surface of the sclera, connecting it with the choroid.l. fusca sclerae [NA], brown layer, membrana fusca;
l. fus´ca scle´rae [NA] l. fusca of sclera
hepatic laminae the plates of liver cells that radiate from the center of the liver lobule.
l. horizonta´lis os´sis palati´ni [NA] horizontal plate of palatine bone
l. inter´na cra´nii [NA] inner table of skull
internal medullary l. See medullary laminae of thalamus.
l. internal ossium cranii vitreous table
iridopupillary l. embryonic precursor of the anterior stroma of the iris which forms the inner (posterior or deep) wall of the primary anterior chamber of the eye. Its central portion becomes attenuated as the pupillary membrane (membrane pupillaris [NA]).
labiogingival l. a band of ectodermal epithelial cells growing into the mesenchyme of the embryonic jaws between the developing lip and the growing gingival elevation; it later opens to form the labiogingival groove.
lateral l. of cartilaginous auditory tube the narrow lateral portion of the cartilaginous part of the auditory tube.l. lateralis cartilaginis tubae auditivae [NA], l. cartilaginis lateralis tubae auditivae [NA], lateral cartilaginous layer, lateral layer of cartilaginous auditory tube;
l. latera´lis cartila´ginis tu´bae auditi´vae [NA] lateral l. of cartilaginous auditory tube
l. latera´lis proces´sus pterygoid´ei [NA] lateral pterygoid plate
lateral medullary l. of corpus striatum a thin, sharply defined layer of fibers separating the putamen from the globus pallidus.l. medullaris lateralis corporis striati [NA];
l. of lens one of a series of concentric layers composed of the lens fibers that make up the substance of the lens.
l. lim´itans ante´rior cor´neae [NA] anterior limiting layer of cornea
l. lim´itans poste´rior cor´neae [NA] posterior limiting layer of cornea
l. lu´cida the lightly staining layer of the basement membrane in contact with the plasmalemma of epithelial cells or other cells having an investment of basement membrane.
medial l. of cartilaginous auditory tube the broad medial portion of the cartilaginous part of the auditory tube.l. medialis cartilaginis tubae auditivae [NA], l. cartilaginis medialis tubae auditivae [NA], medial cartilaginous layer, medial layer of cartilaginous auditory tube;
l. media´lis cartila´ginis tu´bae auditi´vae [NA] medial l. of cartilaginous auditory tube
l. media´lis proces´sus pterygoi´dei [NA] medial pterygoid plate
medial medullary l. of corpus striatum a fiber layer separating the medial and lateral segments of the globus pallidus.l. medullaris medialis corporis striati [NA];
lam´inae medulla´res cerebel´li laminae albae cerebelli
lam´inae medulla´res thal´ami [NA] medullary laminae of thalamus
l. medulla´ris latera´lis cor´poris stria´ti [NA] lateral medullary l. of corpus striatum
l. medulla´ris media´lis cor´poris stria´ti [NA] medial medullary l. of corpus striatum
medullary laminae of thalamus layers of myelinated fibers that appear on transverse sections of the thalamus; the l. medullaris externa marks the ventral and lateral borders of the thalamus and delimits it from the subthalamus and reticular nucleus of thalamus; the l. medullaris interna is interposed between the mediodorsal and ventral nuclei of the thalamus and encloses the intralaminar nuclei (centromedian, paracentral, and central lateral nuclei).laminae medullares thalami [NA], medullary layers of thalamus;
l. membrana´cea cartila´ginis tu´bae auditi´vae [NA] membranous l. of cartilaginous auditory tube
membranous l. of cartilaginous auditory tube the connective tissue membrane that, with the lateral l., completes the lateral and inferior walls of the cartilaginous part of the auditory tube.l. membranacea cartilaginis tubae auditivae [NA], membranous layer;
l. of mesencephalic tectum the roofplate of the mesencephalon formed by the quadrigeminal bodies.l. tecti mesencephali [NA], tectum mesencephali [NA], l. quadrigemina, quadrigeminal l., quadrigeminal plate;
l. modi´oli [NA] plate of modiolus
l. muscula´ris muco´sae [NA] muscularis mucosae
nuclear l. a protein-rich layer lining the inner surface of the nuclear membrane in interphase cells.
orbital l. of ethmoid bone orbital plate of ethmoid bone
l. orbita´lis os´sis ethmoida´lis [NA] orbital plate of ethmoid bone
osseous spiral l. 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 l. the fibers of the cochlear nerve reach the spiral organ (of Corti).l. spiralis ossea [NA], spiral plate;
l. papyra´cea orbital plate of ethmoid bone
l. parieta´lis [NA] parietal layer
l. parietalis pericar´dii parietal layer of serous pericardium
l. parietalis tu´nicae vagina´lis tes´tis parietal layer of tunica vaginalis
periclaustral l. external capsule
l. perpendicula´ris [NA] perpendicular plate
l. perpendicula´ris os´sis ethmoida´lis [NA] perpendicular plate of ethmoid bone
l. perpendicula´ris os´sis palati´ni [NA] perpendicular plate of palatine bone
l. poste´rior vagi´nae mus´culi rec´ti abdo´minis [NA] posterior layer of rectus abdominis sheath
l. pretrachea´lis [NA] pretracheal fascia
l. prevertebra´lis [NA] prevertebral fascia
primary dental l. dental ledge
l. profun´da [NA] deep layer
l. profunda fas´ciae tempora´lis deep layer of temporalis fascia
l. profunda mus´culi levato´ris palpe´brae superio´ris deep layer of levator palpebrae superioris muscle
lamina l. the layer of connective tissue underlying the epithelium of a mucous membrane.l. propria mucosae [NA];
l. pro´pria muco´sae [NA] lamina l
lamina l. of semicircular duct the meshwork of connective tissue fibers between the semicircular duct and the bony semicircular canal; it encloses the perilymph in its spaces.membrana propria ductus semicircularis [NA];
pterygoid laminae See lateral pterygoid plate, medial pterygoid plate.
l. quadrigem´ina l. of mesencephalic tectum
quadrigeminal l. l. of mesencephalic tectum
l. ra´ra the relatively electron-lucent layer on either side of the l. densa of the basement membrane.
reticular l. a major component of the basement membrane, as seen by light microscopy; it consists largely of reticular fibers and ground substances.
l. of Rexed a division of the gray matter of the spinal cord into nine laminae (I-IX) and a gray area around the central canal (area X) based on cytoarchitectural features; the dorsal (posterior) horn is composed of laminae I-VI, the intermediate zone of lamina VII, and the ventral horn of laminae VIII and IX; general correlation of laminae with major nuclei: I, posteromarginal nucleus; II, substantia gelatinosa; III, IV, nucleus proprius (posterior); V, VI, nucleus proprius (anterior); VII, Clarke's nucleus, intermediolateral cell column; VIII, commissural nuclei, interneurons; IX, motor nuclei of ventral horn.
rostral l. 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 l. contains no commissural fibers; instead, it corresponds to the line along which the pia mater reflects from the medial surface of one hemisphere to that of the other.l. rostralis, rostral layer, teniola corporis callosi;
l. rostra´lis rostral l
secondary spiral l. a ridge on the outer wall of the first turn of the cochlea opposite the spiral l.l. spiralis secundaria [NA], secondary spiral plate;
l. sep´ti pellu´cidi [NA] l. of septum pellucidum
l. of septum pellucidum 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.l. septi pellucidi [NA];
l. spira´lis os´sea [NA] osseous spiral l
l. spira´lis secunda´ria [NA] secondary spiral l
substantia l. of cornea proper substance of cornea, modified transparent connective tissue, between the layers of which are open spaces or lacunae nearly filled with the corneal cells or corpuscles.substantia propria corneae [NA];
superficial l. superficial layer
l. superficia´lis [NA] superficial layer
l. superficia´lis fas´ciae cervica´lis [NA] investing layer of deep cervical fascia
l. superficia´lis fas´ciae tempora´lis [NA] superficial layer of temporalis fascia
l. superficia´lis mus´culi levato´ris pal´pebrae superio´ris [NA] superficial layer of the levator palpebrae superioris muscle
suprachoroid l. a layer of loose, pigmented connective tissue on the outer surface of the choroid, resembling and attached to the l. fusca sclerae.l. suprachoroidea [NA], ectochoroidea, suprachoroid layer, suprachoroidea;
l. suprachoroi´dea [NA] suprachoroid l
l. supraneuropor´ica that part of the choroid membrane of the third ventricle that forms the roof of the foramen of Monro.
l. tec´ti mesenceph´ali [NA] l. of mesencephalic tectum
l. termina´lis cer´ebri [NA] l. terminalis of cerebrum
l. terminalis of cerebrum a thin plate passing upward from the optic chiasm and forming the rostral boundary of the third ventricle; membrane closing the rostral neuropore.l. terminalis cerebri [NA], l. cinerea, terminal plate, velum terminale;
l. of thyroid cartilage one of the paired (dextra et sinistra) thin quadrilateral plates of the thyroid cartilage that are joined anteriorly and form an open angle posteriorly.l. cartilaginis thyroideae [NA];
l. tra´gi [NA] l. of tragus
l. of tragus a longitudinal curved plate of cartilage, the beginning of the cartilaginous portion of the external acoustic meatus.l. tragi [NA];
vascular l. of choroid the outer portion of the choroid of the eye containing the largest blood vessels.l. vasculosa choroideae [NA], Haller's vascular tissue, uvaeformis, vascular layer of choroid coat of eye, vascular layer;
l. vasculo´sa choroi´deae [NA] vascular l. of choroid
l. ventra´lis basal l. of neural tube
l. of vertebral arch the flattened posterior portion of the vertebral arch extending between the pedicles and the midline, forming the dorsal wall of the vertebral foramen, and from the midline junction of which the spinous process extends.l. arcus vertebrae [NA], neurapophysis;
l. viscera´lis [NA] visceral layer
l. viscera´lis pericar´dii [NA] visceral layer of serous pericardium
l. viscera´lis tu´nicae vagina´lis tes´tis [NA] visceral layer of tunica vaginalis of testis
l. vit´rea l. basalis choroideae

 

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