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Reticular Membrane
The reticular membrane (RM, also called reticular lamina or apical cuticular plate)Histology and Virtual Microscopy Learning Resources University of Michigan Medical School; accessed 4 Apr 2013 is a thin, stiff lamina that extends from the outer hair cells to the Hensen's cells.Radivoj V. Krstic Human Microscopic Anatomy: An Atlas for Students of Medicine and Biology Springer, 1991; pp 554. . The RM is composed of "minute-fiddle-shaped cuticular structures" called t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Spiral Organ Of Corti
The organ of Corti, or spiral organ, is the receptor organ for hearing and is located in the mammalian cochlea. This highly varied strip of epithelium, epithelial cells allows for transduction of auditory signals into nerve impulses' action potential. Transduction occurs through vibrations of structures in the inner ear causing displacement of cochlear fluid and movement of hair cells at the organ of Corti to produce electrochemical signals.The Ear Pujol, R., Irving, S., 2013 Italian anatomist Alfonso Giacomo Gaspare Corti (1822–1876) discovered the organ of Corti in 1851. The structure evolved from the basilar papilla and is crucial for mechanotransduction in mammals. Structure [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
University Of Michigan Medical School
The University of Michigan Medicine (branded as Michigan Medicine) is the academic medical center of the University of Michigan, a public research university in Ann Arbor, Michigan. It consists of the university's Medical School, affiliated hospitals, and affiliated healthcare centers. History In 1869 the University of Michigan opened the first hospital in the country owned and operated by a university, in a house in Ann Arbor originally built as a professor's residence. In 1876 a new hospital building was opened adjacent to the old one. At the insistence of the Michigan Legislature, the new building had two separate departments, one for medicine and the other for homeopathy. In 1891 the hospital moved to a set of new buildings away from the university campus, on Catherine Street. The homeopathy department closed in 1921. In 1925 the university opened a hospital building at a cost of $3.85 million. It was designed by Albert Kahn (architect), Albert Kahn and built by T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Endolymph
Endolymph is the fluid contained in the membranous labyrinth of the inner ear. The major cation in endolymph is potassium, with the values of sodium and potassium concentration in the endolymph being 0.91 mM and 154 mM, respectively. It is also called ''Scarpa's fluid'', after Antonio Scarpa. Structure The inner ear has two parts: the bony labyrinth and the membranous labyrinth. The membranous labyrinth is contained within the bony labyrinth, and within the membranous labyrinth is a fluid called endolymph. Between the outer wall of the membranous labyrinth and the wall of the bony labyrinth is the location of perilymph. Composition Perilymph and endolymph have unique ionic compositions suited to their functions in regulating electrochemical impulses of hair cells. The electric potential of endolymph is ~80-90 mV more positive than perilymph due to a higher concentration of K compared to Na. The main component of this unique extracellular fluid is potassium, whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Cochlear Duct
Cochlear, the adjective form of cochlea, may refer to: * Cochlear implant, a sensory aid for the deaf * Cochlear nuclei, the ventral cochlear nucleus and the dorsal (or lateral) cochlear nucleus * Vestibular-cochlear or Vestibulocochlear nerve, the eighth cranial nerve * Cochlear nerve, a division of the eighth cranial nerve * Cochlear aqueduct, or aqueduct of cochlea, a communication between the perilymphatic space and the subarachnoid space * Cochlear artery, a division of the internal auditory artery * Cochlea, part of the Labyrinth (inner ear) * Cochlear duct, also known as the scala media, the endolymph-filled part of the cochlea * Cochlear, an alternate term for the spoon (liturgy) used in the Eastern Orthodox Church in serving the sacramental wine, sometimes with a particle of the sacramental bread * The spoon-like tip of the scape found on the epigyne of some female spiders * Cochlear Limited, manufacturer of Nucleus Cochlear Implant * Cochlear Bone Anchored Solu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Perilymph
Perilymph is an extracellular fluid located within the inner ear. It is found within the scala tympani and scala vestibuli of the cochlea. The ionic composition of perilymph is comparable to that of plasma and cerebrospinal fluid. The major cation in perilymph is sodium, with the values of sodium and potassium concentration in the perilymph being 138 mM and 6.9 mM, respectively. It is also named Cotunnius' liquid and liquor cotunnii for Domenico Cotugno. Structure The inner ear has two major parts, the cochlea and the vestibular organ. They are connected in a series of canals in the temporal bone referred to as the bony labyrinth. The bone canals are separated by the membranes in parallel spaces referred to as the membranous labyrinth. The membranous labyrinth contains endolymph, and is surrounded by perilymph. The perilymph in the bony labyrinth serves as connection to the cerebrospinal fluid of the subarachnoid space via the perilymphatic duct. Composition Per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Scala Tympani
The tympanic duct or scala tympani is one of the perilymph-filled cavities in the inner ear of humans. It is separated from the cochlear duct by the basilar membrane, and it extends from the round window to the helicotrema, where it continues as vestibular duct. The purpose of the perilymph-filled tympanic duct and vestibular duct is to transduce the movement of air that causes the tympanic membrane and the ossicles to vibrate causing movement of liquid and the basilar membrane. This movement is conveyed to the organ of Corti inside the cochlear duct, composed of hair cells attached to the basilar membrane and their stereocilia embedded in the tectorial membrane. The movement of the basilar membrane compared to the tectorial membrane causes the stereocilia to bend. They then depolarise and send impulses to the brain via the cochlear nerve. This produces the sensation of sound. Additional images File:Right_osseous_labyrinth_interior_svg_hariadhi.svg, Interior of right osseous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Tectorial Membrane (cochlea)
The tectoria membrane (TM) is one of two acellular membranes in the cochlea of the inner ear, the other being the basilar membrane (BM). "Tectorial" in anatomy means forming a cover. The TM is located above the spiral limbus and the spiral organ of Corti and extends along the longitudinal length of the cochlea parallel to the BM. Radially the TM is divided into three zones, the limbal, middle and marginal zones. Of these the limbal zone is the thinnest (transversally) and overlies the auditory teeth of Huschke with its inside edge attached to the spiral limbus. The marginal zone is the thickest (transversally) and is divided from the middle zone by Hensen's Stripe. It overlies the sensory inner hair cells and electrically-motile outer hair cells of the organ of Corti and during acoustic stimulation stimulates the inner hair cells through fluid coupling, and the outer hair cells via direct connection to their tallest stereocilia. Structure The TM is a gel-like structure contai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
