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The apex beat (lat. ictus cordis), also called the apical impulse, [1] is the pulse felt at the point of maximum impulse (PMI), which is the point on the precordium farthest outwards (laterally) and downwards (inferiorly) from the sternum at which the cardiac impulse can be felt.
The inner ear (internal ear, auris interna) is the innermost part of the vertebrate ear. In vertebrates , the inner ear is mainly responsible for sound detection and balance. [ 1 ] In mammals , it consists of the bony labyrinth , a hollow cavity in the temporal bone of the skull with a system of passages comprising two main functional parts: [ 2 ]
246190 Ensembl ENSG00000155719 ENSMUSG00000034990 UniProt Q7RTW8 Q8K561 RefSeq (mRNA) NM_001161683 NM_144672 NM_170664 NM_139310 RefSeq (protein) NP_001155155 NP_653273 NP_733764 NP_647471 Location (UCSC) Chr 16: 21.66 – 21.76 Mb Chr 7: 120.68 – 120.76 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Otoancorin is a protein found in the vertebrate inner ear, on the sensory ...
The Outer ear consists of the pinna or auricle (visible parts including ear lobes and concha), and the auditory meatus (the passageway for sound). The fundamental function of this part of the ear is to gather sound energy and deliver it to the eardrum. Resonances of the external ear selectively boost sound pressure with frequency in the range 2 ...
Animals with a greater ear distance can localize lower frequencies than humans can. For animals with a smaller ear distance the lowest localizable frequency is higher than for humans. If the ears are located at the side of the head, interaural level differences appear for higher frequencies and can be evaluated for localization tasks.
Stereocilia (or stereovilli or villi) are non-motile apical cell modifications.They are distinct from cilia and microvilli, but are closely related to microvilli.They form single "finger-like" projections that may be branched, with normal cell membrane characteristics.
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The stapes (stirrup) ossicle bone of the middle ear transmits vibrations to the fenestra ovalis (oval window) on the outside of the cochlea, which vibrates the perilymph in the vestibular duct (upper chamber of the cochlea). The ossicles are essential for efficient coupling of sound waves into the cochlea, since the cochlea environment is a ...