Hippocampus
Limbic system (amygdala, hippocampus, hypothalamus, cingulate) generates and tags emotional meaning; prefrontal cortex plans, inhibits and decides.
What our notes say
- Limbic system (amygdala, hippocampus, hypothalamus, cingulate) generates and tags emotional meaning; prefrontal cortex plans, inhibits and decides. (Are Human Beings Thinkers with Emotions, or Emotional Thinkers?)
- Cortical, diffuse — hippocampus and association cortices affected early (Ovarian & Colorectal Cancer: Risks, Pathogenesis, Staging)
- | Temporal | Auditory processing, language comprehension (Wernicke's area), memory (hippocampus lies deep), emotion (amygdala) | (END YEAR PP1 & PP2 2025 Physiology: MCQs for Medical School Exams)
- | Rabies | Negri bodies | Cytoplasm of neurons | Eosinophilic; hippocampus and Purkinje cells | (EXAM: Bacteriophages, Laboratory Diagnosis, HPV & Parvovirus B19)
- Vulnerable regions: Large cortical pyramidal neurons (layers III/V) → pseudolaminar cortical necrosis (deep layers); CA1 (Sommer sector) hippocampus; cerebellar Purkinje cells (less than hypoxia) (Pathology of Demyelinating Diseases: MS, NMO, ADEM, CPM)
- Selective injury: Cortical layers III/V, CA1 hippocampus, Purkinje cells (Pathology of Demyelinating Diseases: MS, NMO, ADEM, CPM)
Study material on Hippocampus
Practice questions on Hippocampus
Which structure connects the hippocampus to the limbic system?
- Mamillothalamic tract
- Fornix
- Anterior commissure
- Medial forebrain bundle
- Arcuate fasciculus
Answer: B. The fornix is the major output pathway from the hippocampus, connecting it to other limbic structures including the mammillary bodies, septal nuclei, and hypothalamus. It is crucial for hippocampal communication within the limbic system. The other tracts have different functions and connections. ---
A patient with right-sided removal of the hippocampus would be impaired on which of the following ---
- Short-term verbal memory
- Long-term verbal memory
- Short-term visuo-spatial memory
- Long-term visuo-spatial memory
Answer: D.