Search results
Results From The WOW.Com Content Network
The cupula is the onion-shaped structure surrounded by endolymph in the ampulla. The ampullary cupula, or cupula, is a structure in the vestibular system, providing the sense of spatial orientation. The cupula is located within the ampullae of each of the three semicircular canals.
The receptor cells located in the semicircular ducts are innervated by the eighth cranial nerve, the vestibulocochlear nerve (specifically the vestibular portion). The crista ampullaris itself is a cone-shaped structure, covered in receptor cells called "hair cells".
At one end of each of the semicircular ducts is a dilated sac called a membranous ampulla, which is more than twice the diameter of the ducts. Each ampulla contains an ampullary crest, the crista ampullaris which consists of a thick gelatinous cap called a cupula and many hair cells. The superior and posterior semicircular ducts are oriented ...
Two examples in the United States, one at Dumbarton Oaks near Washington, D. C. and one in the Detroit Institute of Arts, appear to be cast from the same mould. [42] There is an example with a Crucifixion and Ascension in the Cleveland Museum of Art (clear image online).
The nerve reaches the surface by passing through the tympanomastoid fissure between the mastoid process and the tympanic part of the temporal bone, and divides into two branches: one joins the posterior auricular nerve. the other is distributed to the skin of the back of the ear (auricle) and to the posterior part of the ear canal.
Ampullae of Lorenzini are physically associated with and evolved from the mechanosensory lateral line organs of early vertebrates.Passive electroreception using ampullae is an ancestral trait in the vertebrates, meaning that it was present in their last common ancestor. [7]
The saccule (Latin: sacculus) is a bed of sensory cells in the inner ear that detects linear acceleration and head tilting in the vertical plane, and converts these vibrations into electrical impulses to be interpreted by the brain. When the head moves vertically, the sensory cells of the saccule are moved due to a combination of inertia and ...
The stria vascularis produces endolymph for the scala media, one of the three fluid-filled compartments of the cochlea. [4] This maintains the ion balance of the endolymph that surround inner hair cells and outer hair cells of the organ of Corti. [4] It secretes lots of K +, [1] [4] and may also secrete H +. [1]