TROCHLEARIS Meaning and
Definition
-
Trochlearis, also known as the trochlear muscle or the fourth cranial nerve, refers to a small, unique muscle responsible for eye movement. It is named after its pulley-like structure, resembling a trochlea or a sling. Found within the orbit of the eye, the trochlearis muscle aids in the rotational movement of the eyeball.
The trochlearis muscle is innervated by the fourth cranial nerve, also known as the trochlear nerve or the pathetic nerve. This nerve emerges from the dorsal midbrain and is the smallest of the twelve cranial nerves. It decussates (crosses over) inside the skull before reaching the trochlearis muscle, giving it its unique anatomical course.
The primary action of the trochlearis muscle is to allow the eyeball to move inwards (intorsion) and downwards (depression). Its contraction facilitates the eye's rotation, particularly the superior oblique muscle's function, which acts to depress, abduct, and slightly extort the eye. This coordinated movement allows for visual tracking and provides depth perception.
Injury or dysfunction of the trochlearis muscle or its associated nerve can result in various eye movement disorders, such as trochlear nerve palsy. Symptoms may include double vision (diplopia), impaired vertical eye movement, or difficulty in looking downward.
Understanding the anatomy and function of the trochlearis muscle is essential in diagnosing and managing disorders that affect eye movement, ensuring optimal vision and a comprehensive understanding of ocular physiognomy.
-
1. Musculus obliquus superior. 2. Nervus trochlearis.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for TROCHLEARIS
- rrochlearis
- frochlearis
- grochlearis
- yrochlearis
- 6rochlearis
- 5rochlearis
- teochlearis
- tdochlearis
- tfochlearis
- ttochlearis
- t5ochlearis
- t4ochlearis
- trichlearis
- trkchlearis
- trlchlearis
- trpchlearis
- tr0chlearis
- tr9chlearis
- troxhlearis
Etymology of TROCHLEARIS
The word "trochlearis" has its roots in Latin. It is derived from the Latin word "trochlea", which means "pulley". The suffix "-aris" is common in Latin and is added to form an adjective, which means "pertaining to" or "related to". Therefore, "trochlearis" can be translated as "related to the pulley" or "pertaining to the pulley". In anatomical terms, "trochlearis" refers to structures that resemble or function like a pulley, such as the trochlearis muscle in the eye.
Similar spelling words for TROCHLEARIS
- truckler,
- trochlear,
- truecolors,
- tricolours,
- trochlears,
- tracklayers,
- tricoloris,
- tricolour,
- torculars,
- tricolor,
- tracheal,
- tracklayer,
- trichloride,
- tricolors,
- trucklers.
Infographic
Add the infographic to your website:
