median eminence

(noun)

Part of the inferior boundary for the hypothalamus and one of the seven areas of the brain devoid of a blood-brain barrier.

Related Terms

Examples of median eminence in the following topics:

  • Circumventricular Organs

    • Median eminence: Allows for the transport of neurohormones between the CSF and the peripheral blood supply.

  • Blood-Brain Barrier

    • These include the circumventricular organs such as the area postrema, median eminence of the hypothalamus, pineal gland, and the posterior pituitary.
    • The median eminence is not covered by BBB because the pituitary secretions collect in this area before release into circulation.

  • The Anterior Pituitary

    • Neuroendocrine neurons in the hypothalamus project axons to the median eminence, at the base of the brain.

  • Carpal Tunnel Syndrome

    • Carpal tunnel syndrome is an entrapment median neuropathy of the median nerve due to its compression at the wrist in the carpal tunnel.
    • Carpal tunnel syndrome (CTS) is an entrapment median neuropathy, causing paresthesia, pain, numbness, and other symptoms in the distribution of the median nerve due to its compression at the wrist in the carpal tunnel .
    • The pathophysiology is not completely understood but can be attributed to the compression of the median nerve traveling through the carpal tunnel.
    • Long-standing CTS leads to permanent nerve damage with constant numbness, atrophy of some of the muscles of the thenar eminence, and weakness of palmar abduction.
    • Carpal tunnel syndrome can be associated with any condition that causes pressure on the median nerve at the wrist.

  • Facial (VII) Nerve

  • The Hyoid Bone

    • The lesser horns are two smaller eminences which project superiorly to the join between the greater cornua and body and are attached to the body by fibrous tissue.

  • Veins of the Upper Limbs

    • The major superficial veins of the upper limb are the cephalic, median cubital and basilic veins.
    • At the elbow the basilic and cephaliac veins are linked by the median cubital vein, from which blood is often drawn.

  • Medulla Oblongata

    • The region between the anterior median and anterolateral sulci is occupied by an elevation on either side known as the pyramid of medulla oblongata.
    • In the lower part of the medulla, some of these fibers cross each other, thus obliterating the anterior median fissure.
    • Other fibers that originate from the anterior median fissure above the decussation of the pyramids and run laterally across the surface of the pons are known as the external arcuate fibers.
    • The posterior part of the medulla between the posterior median and posterolateral sulci contains tracts that enter it from the posterior funiculus of the spinal cord.

  • Epithalamus and Pineal Gland

    • A brain sectioned in the median sagittal plane.

  • Embryological and Fetal Events

    • The hymen represents the remains of the Müllerian eminence.