What are the septal nuclei?

The septal nuclei are composed of medium-size neurons which are classified into dorsal, ventral, medial, and caudal groups. The septal nuclei receive reciprocal connections from the olfactory bulb, hippocampus, amygdala, hypothalamus, midbrain, habenula, cingulate gyrus, and thalamus.

Where is the septal nuclei located?

The septal nuclei are present in most vertebrates, and in primates they are located medially in the cerebral hemispheres inferior to the rostrum of the corpus callosum and anterior to the third ventricle (Fig. 1; Mark et al., 1994).

Is the septal nuclei part of the limbic system?

The septal nuclei are considered part of the limbic system, a group of subcortical structures that are often linked to emotion but are really involved in a long list of functions in the human brain.

What are limbic nuclei?

With a primordial structure, the limbic system is involved in lower order emotional processing of input from sensory systems and consists of the amygdaloid nuclear complex (amygdala), mammillary bodies, stria medullaris, central gray and dorsal and ventral nuclei of Gudden.

What does the septum in the heart do?

The hole (defect) occurs in the wall (septum) that separates the heart’s lower chambers (ventricles) and allows blood to pass from the left to the right side of the heart.

What is the function of the septal area?

The septal area is a subcortical region that has strong projections to emotion-generating areas and has a key role in feelings of social connectedness and bonding. In rats, oxytocin binding in the septal area has been associated with maternal behaviors that promote kinship bonds (Francis, Champagne, & Meaney, 2000).

What does the septum do?

The septum allows the air that we breathe in through our nostrils to go directly from the tip of the nose into the back of the nose and into the lungs. Without the septum, the air that we breathe in might “get lost” in our nose; the turbulence might interfere with the direct transit of the air directly into the lungs.

What is the function of the Uncus?

Functionally, the uncus is involved in olfaction, emotions, and forming new memories mainly due to its connectivity with multiple nuclei and cortices related to these functions. Uncal herniation syndrome and uncinate fits of mesiotemporal epilepsy are the main neurological abnormalities associated with this structure.

How thick is the septum of the heart?

The interventricular septum increased from a median of 8.3 mm in the age group 20-29 to 11.2 mm in the group 60-70, whereas the posterior left ventricular wall increased from 7.5 mm to 9.8 mm.

What happens if the septum has a hole?

The hole increases the amount of blood that flows through the lungs. A large, long-standing atrial septal defect can damage your heart and lungs. Surgery or device closure might be necessary to repair atrial septal defects to prevent complications.

What is absent septum pellucidum?

The absence of the septum pellucidum is a rare condition that affects the structure of the brain. Specifically, a thin membrane called the septum pellucidum is missing from its normal position in the middle of the brain.