Where is the otic vesicle?
Where is the otic vesicle?
Where is the otic vesicle?
inner ear
Otic vesicle, or auditory vesicle, consists of either of the two sac-like invaginations formed and subsequently closed off during embryonic development. It is part of the neural ectoderm, which will develop into the membranous labyrinth of the inner ear.
What develops from otic placode?
The inner ear is derived from the otic placode, which invaginates to form the otocyst, a closed vesicle located within the temporal bone. The otocyst, surrounded by mesenchyme, condenses during development and differentiates into the otic capsule.
What is otic pit?
The auditory pit, also known as the otic pit, is the first rudiment of the internal ear. It appears shortly after that of the eye, in the form of a patch of thickened ectoderm, the auditory plate, over the region of the hind-brain. The auditory plate becomes depressed and converted into the auditory pit (or otic pit).
What part of the ear arises from the otic vesicle?
The utricle and semicircular canals are the organs of balance and originate from the dorsal utricular portion of the otic vesicle.
What is otic capsule?
The otic capsule or osseous (bony) labyrinth refers to the dense bone of the petrous temporal bone that surrounds the membranous labyrinth of the inner ear. It is surrounded by the less dense and variably pneumatized petrous apex and mastoid part of the temporal bone.
WHAT IS lens vesicle?
The lens vesicle is a polarized structure, with posterior cells that exit the cell cycle and terminally differentiate into elongated, crystallin-expressing, primary lens fibers that gradually fill the vesicle. In contrast, the anterior cells remain undifferentiated with proliferative capacity.
How is otic vesicle formed?
The inner ear and cochleovestibular ganglion (CVG) derive from a specialized region of head ectoderm termed the otic placode. During embryogenesis, the otic placode invaginates into the head to form the otic vesicle (OV), the primordium of the inner ear and CVG.
What is a placode?
Placode (or neural placode) refers in terms of radiology to a segment of non-neurulated neural tissue, which has had development frozen in the neural plate stage. A placode can be found in all open spinal dysraphisms and in some closed spinal dysraphisms.
What is the Endolymphatic duct?
The endolymphatic duct is a small epithelial-lined channel, part of the membranous labyrinth that passes through the vestibular aqueduct in the bony labyrinth of the petrous temporal bone. It arises from the utricle and saccule via the utriculosaccule duct and drains endolymph.
What is the purpose of the semicircular canals?
Your semicircular canals are three tiny, fluid-filled tubes in your inner ear that help you keep your balance. When your head moves around, the liquid inside the semicircular canals sloshes around and moves the tiny hairs that line each canal.
What portion of the ear is responsible for hearing?
the cochlea
The inner ear has two parts: the cochlea, responsible for hearing. the vestibular system, responsible for balance.
What is otic vesicle?
The otic vesicle is a transitory autonomous structure that contains all the information required to undergo the differentiation program and thus to generate most cell types of the adult inner ear (Bissonnette and Fekete, 1996; Sanchez-Calderon et al., 2007).