What is Indusium Griseum?

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Medical Definition of indusium griseum : a thin layer of gray matter over the dorsal surface of the corpus callosum.

What does Indusium mean?

Definition of indusium : an investing outgrowth or membrane especially : an outgrowth of a fern frond that covers the sori.

Where is the Indusium Griseum?

The indusium griseum (IG) is a thin bilateral stripe-like allocortical brain area covering the entire anterior–posterior extent of the corpus callosum at the basis of the cingulate cortex.

What is brain fornix?

The fornix is a white matter bundle located in the mesial aspect of the cerebral hemispheres, which connects various nodes of a limbic circuitry and is believed to play a key role in cognition and episodic memory recall.

What is false indusium?

function in ferns One is the so-called false indusium, a rolled-over leaf margin under which sporangia form and mature. The true indusium is a separate and unique formation, the structural origins of which are not clear, that constitutes a more or less papery covering over the sorus.

What is a fern indusium?

The indusium is round, shaped like a tiny umbrella and attached to the leaf from the middle. These sword fern indusia do not quite reach the edge of the sori. Individual sporangia are easily visible around the edge of each sorus. Sori with hood-like indusia.

Is the cingulum the same as the cingulate cortex?

It is located beneath the cingulate gyrus within the medial surface of the brain therefore encircling the entire brain. There are two primary parts of the cingulate cortex: the posterior cingulate cortex and the anterior cingulate cortex. The anterior is linked to emotion, especially apathy and depression.

Where is cingulum found?

What Is a Cingulum? According to MediLexicon, the cingulum of the tooth is a U-shaped ridge located on your upper central and lateral incisors and on the upper cuspids (also called canines) on the tongue-facing side of the tooth. This convex ridge runs vertically from the gumline to the central portion of the tooth.

Where does the fornix originate from?

the hippocampus
The fornix originates in the hippocampus, where it emerges from a collection of fibers called the fimbria. It then stretches up and around the thalamus toward the front of the brain. When it reaches a tract called the anterior commissure, it branches downward.

What is the function of the fornices?

What is the function of the indusium?

A flap of tissue that protects the sori in some ferns. This can take a variety of forms. When spores are mature and ready for release, the indusia usually shrivel or bend backwards to expose the sporangia.

What is the difference between Eusporangiate and Leptosporangiate?

Eusporangium is developed from a group of initial cells. Leptosporangium is developed from a single initial cell. Sporangial initial undergo a periclinal division to form an outer layer and an inner layer of cells. Sporangial initial undergo a periclinal division to form an outer cell and inner cell.

What is the relationship between a Sorium and an indusium?

structure in ferns protective flap of tissue (indusium), which is attached laterally along the inner side of the sorus. The spores are mostly bean-shaped (bilateral).

What’s a sorus?

Definition of sorus : a cluster of plant reproductive bodies: such as. a : a cluster of sporangia on the underside of a fertile fern frond. b : a mass of spores bursting through the epidermis of the host plant of a parasitic fungus. c : a cluster of gemmae on the thallus of a lichen.

What is the meaning of cingulum?

Medical Definition of cingulum 1 : a ridge about the base of the crown of a tooth. 2 : a tract of association fibers lying within the cingulate gyrus and connecting the callosal and hippocampal convolutions of the brain.

What is a cingulum Roman?

A cingulum militare was a piece of ancient Roman military equipment in the form of a belt decorated with metal fittings, which was worn as a badge of rank by soldiers and officials.