The spelling of the term "open commissura" can be explained through its phonetic transcription using the International Phonetic Alphabet (IPA). The word is pronounced as [oʊpən kəˌmɪʃərə]. The IPA symbols show that the "o" is a diphthong sound, the "e" is a short vowel sound, and the "u" is a short vowel sound followed by the "n" sound. The "k" and "s" sounds are also present in the word. The "a" is pronounced as a short "u" sound, while the final "ra" constitutes an unstressed syllable.
The term "open commissura" refers to a specific anatomical feature of an organism, particularly in vertebrates, where it describes a visibly unobstructed or clear passage between two structures or regions. Specifically, it relates to a condition or state wherein a commissure or connecting structure is not fully fused or closed, allowing for the transfer or communication of various substances, signals, or structures between the connected regions.
Commissures are generally defined as bundles of nerve fibers or tracts that bridge or connect corresponding regions of the central nervous system (CNS) on both sides of the body. They play a crucial role in facilitating interhemispheric communication or coordination. In this context, an "open commissura" signifies that the commissure is incompletely or partially fused, suggesting a communication pathway that is visible or unobstructed.
The concept of an open commissura can also extend beyond neurological contexts to include other structural or functional connections within an organism. For instance, open commissura may describe unobstructed channels or passages that exist between organs, blood vessels, glands, or other anatomical structures facilitating the transportation or exchange of various substances, such as blood, fluids, hormones, or other regulatory agents.
In summary, open commissura refers to the state or condition wherein a connecting structure or commissure between regions or organs is not fully fused or closed, allowing for visible or unobstructed transfer or communication of substances or signals between the connected parts.
Inferior commissure, commissure of v. Gudden, a transverse fiber tract in the tuber cinereum just behind the optic chiasm.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The term "open commissura" is not a commonly used term in English. However, based on the words included in the phrase, we can speculate about the possible etymology.
"Open" is derived from the Old English word "openian", which means "to open, disclose, or reveal". It can be traced back to the Proto-Germanic word "opanojan", meaning "to open".
"Commissura" is derived from the Latin word "commissūra", meaning "a joining together". It is derived from the verb "committere", meaning "to bring together, unite, or join".
Therefore, if we combine these words, "open commissura" might be interpreted as a phrase that could mean an "open joining" or "open connection".