What is the hippocampal sulcus?

The hippocampal sulcus is the inferior lateral extension of the transverse fissure (of Bichat), which in turn communicates with the ambient cistern. It is a shallow groove on the medial surface of the hippocampus, between the dentate gyrus and subiculum, inferior to the fimbria and fimbriodentate sulcus 1. What is a hippocampal sulcus remnant cyst?
Hippocampal sulcus remnant cysts are residual cavities due to lack of hippocampal fissure obliteration. These incidental finding are located laterally between the Ammon’s horn and the dentate gyrus.

Is the subiculum part of the hippocampus?

The subiculum (plural: subicula) is located in the mesial temporal lobe and is a subdivision of the hippocampal formation, along with Ammon’s horn, the entorhinal cortex and the hippocampus proper. It is the predominant output source of the hippocampal formation. What is hippocampal formation?
The hippocampal formation is a prominent C-shaped structure bulging in the floor of the temporal horn of the lateral ventricle. … The other regions that together comprise the hippocampal formation consist of the dentate gyrus, the subicular complex, and the entorhinal cortex.

What is a brain sulcus?

Cerebral sulci and fissures are grooves between the adjacent gyri on the surface of the cerebral hemispheres. … Some may not be present in a number of individuals and others deep enough to produce elevations on the surface of the ventricles (e.g. collateral sulcus, calcarine sulcus/calcar avis) 4. What does damage to the hippocampus do?

If one or both parts of the hippocampus are damaged by illnesses such as Alzheimer’s disease, or if they are hurt in an accident, the person can experience a loss of memory and a loss of the ability to make new, long-term memories.

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Frequently Asked Questions(FAQ)

Can choroidal fissure cyst cause headaches?

They reported that the cysts could not explain the patients’ signs or symptoms5 ). de Jong et al.3 ) reported 6 patients with a CSF-containing cyst at the level of choroidal fissure with neurological symptoms such as headache, narcolepsy and hyperactivity disorder.

What is a remnant cyst?

Hippocampal sulcus remnant cysts, also known as hippocampal cavities, are remnants of incomplete involution of the embryonic hippocampal fissure and are an incidental finding.

What are three functions of the hippocampus?

Being an integral part of the limbic system, hippocampus plays a vital role in regulating learning, memory encoding, memory consolidation, and spatial navigation.

What emotions does the hippocampus control?

The hippocampus, located in the medial temporal lobe and connected with the amygdala that controls emotional memory recalling and regulation (Schumacher et al., 2018); it has increased the functional connectivity with anterior cingulate or amygdala during emotional regulation and recalling of positive memory (Guzmán- …

What is the difference between hippocampus and hypothalamus?

Where do subiculum projects go?

Witter, pers. comm.). Ventral subiculum projects to the hypothalamus via the postcommissural fornix, the medial corticohypothalamic tract and the amygdala; these projections innervate the medial preoptic area, the ventromedial and dorsomedial nuclei, and ventral premammillary and medial mammillary nuclei.

What is your entorhinal region?

Definition. The entorhinal (inside rhinal) area is a part of the cortex that is partially enclosed by the rhinal( olfactory) sulcus. It is a major part of the medial temporal lobe memory system and constitutes the major gateway between the hippocampal formation and the neocortex.

Where is the neocortex?

cerebral cortex The neocortex comprises the largest part of the cerebral cortex and makes up approximately half the volume of the human brain. It is thought to be responsible for the neuronal computations of attention, thought, perception and episodic memory.

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What is Papez circuit?

The Papez circuit /peɪpz/, or medial limbic circuit, is a neural circuit for the control of emotional expression. In 1937, James Papez proposed that the circuit connecting the hypothalamus to the limbic lobe was the basis for emotional experiences.

What is hippocampal gyrus?

The parahippocampal gyrus (or hippocampal gyrus) is a grey matter cortical region of the brain that surrounds the hippocampus and is part of the limbic system. The region plays an important role in memory encoding and retrieval. It has been involved in some cases of hippocampal sclerosis.

What does fornix connect?

The fornix connects: the hippocampus to the mammillary bodies. the hippocampus to the septal nuclei and the nuclei accumbens. the mammillary bodies to the anterior nuclei of the thalamus.

How are sulcus formed?

Cerebral sulci and fissures are grooves between the adjacent gyri on the surface of the cerebral hemispheres. By allowing the cortex to invaginate to form sulci and gyri the surface area of the cortex is increased threefold 4.

How are sulcus described?

A sulcus is a shallower groove that surrounds a gyrus. A fissure is a large furrow that divides the brain into lobes and also into the two hemispheres as the longitudinal fissure.

What does Sulcal mean?

1. A deep, narrow furrow or groove, as in an organ or tissue. 2. Any of the narrow fissures separating adjacent convolutions of the brain.

What is hippocampal volume loss?

Stress causes a loss in total hippocampal volume as early as day3, which progresses with the 10-day chronic stress. The right hippocampal volume loss is evident only after chronic stress, but the left hippocampal volume loss is evident as early as day3 and progresses with the 10-day chronic stress paradigm.

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What happens if the hippocampus is removed?

In short, the hippocampus orchestrates both the recording and the storage of memories, and without it, this “memory consolidation” cannot occur.

What causes hippocampal atrophy?

The hippocampus and surrounding areas within the medial temporal lobe are typically involved in Alzheimer disease (AD),2 6 but are also affected in other dementias, such as vascular dementia (VaD). In AD, hippocampal atrophy (HA) is usually attributed to the deposition of neurofibrillary tangles and neuritic plaques.

How common are choroidal fissure cysts?

Choroidal fissure cysts are rare and often incidentally discovered [1]. There are a few cases reported and they are usually asymptomatic. The relationship between complex partial seizure and temporal fissure cyst is controversial [2].

What kind of doctor removes a cyst?

What Type of Doctors Treat Cysts? While most primary care doctors or surgeons can treat cysts on the skin, dermatologists most commonly treat and remove sebaceous and pilar cysts. Dermatologists are focused on treating the skin — so removing cysts is a natural part of their training and focus.

What can happen if a cyst is left untreated?

Some cysts are cancerous and early treatment is vital. If left untreated, benign cysts can cause serious complications including: Infection – the cyst fills with bacteria and pus, and becomes an abscess. If the abscess bursts inside the body, there is a risk of blood poisoning (septicaemia).

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