Dictionary > Petrotympanic fissure

Petrotympanic fissure

Definition
noun
A narrow transverse slit dividing the mandibular fossa of the temporal bone into tympanic and petrous portions.
Supplement
The contents of the fissure include communications of cranial nerves VII and IX to the infratemporal fossa.
Word origin:
Synonyms:

  • glaserian fissure
  • fissura petrotympanica


You will also like...

An artistic depiction of Dunkleosteus fish
Fish

The sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over..

Plant Water Regulation
Plant Water Regulation

Plants need to regulate water in order to stay upright and structurally stable. Find out the different evolutionary adap..

New Zealand Flora & Fauna
Ecology & Biodiversity: New Zealand Flora & Fauna

New Zealand is known for its unique biodiversity, caused by its remarkable geography and geologic history. Breaking away..

Ecological Research Measuring & Analysis
Ecological Research: Measuring & Analysis

This lesson is about the methods used for ecological research, such as quadrat and transect sampling, canopy fogging, an..

Freshwater aquatic plankton
Freshwater Communities & Plankton

Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..

Buttress roots
Roots

This study guide tackles plant roots in greater detail. It delves into the development of plant roots, the root structur..

Related Articles...

No related articles found

See all Related Topics