concha
/ˈkɒŋkə
/noun (plural conchae /ˈkɒŋkiː/) Anatomy & Zoology
1A part resembling a spiral shell, in particular:A placebo point in the inferior concha and the active stomach point on the concha ridge (both innervated by vagus nerve) were isolated with the Agiscop DT....
- The ethmoid may exhibit two to four conchae (not including the inferior or maxilloturbinate).
- On either side of the crest are air sinuses, the sphenoid sinuses, which are partially roofed over by the sphenoid conchae.
1.1The depression in the external ear leading to its central opening.The convolutions of the external ear, particularly the concha, act to increase or decrease the amplitude of different frequency components of a sound as it passes from the free field to the eardrum....
- The points are found, explains Sara, by imagining a baby in an inverted foetal position, with the earlobe representing the head, the concha the internal organs and so on.
- In the majority of cases there is a combination of too much cartilage in the central bowl shaped portion of the ear called the concha, and a failure of the natural folds to develop in the portion of the ear known as the antihelix.
1.2 (also nasal concha) Any of several thin, scroll-like (turbinate) bones in the sides of the nasal cavity.What Wittmer does find is a very close and convincing homology between the conchae (turbinals, cristae, etc.) marked in red in the figures adapted from his review....
- From the roof, the olfactory epithelium extends down both sides of the nasal cavity to cover most of the superior concha laterally and 1 cm of nasal septum medially.
- An increase in the number of nasal conchae is common.
Origin
Late 16th century: from Latin (see conch).