basal plate

(noun)

In the developing nervous system, this is the region of the neural tube ventral to the sulcus limitans. It extends from the rostral mesencephalon to the end of the spinal cord and contains primarily motor neurons.

Related Terms

  • notochord
  • alar plate
  • neurulation

Examples of basal plate in the following topics:

  • Embryonic Development of the Brain

    • This strip is called the neural plate, and is the origin of the entire nervous system.
    • The neural plate folds outwards to form the neural groove.
    • The anterior (front) part of the neural tube is called the basal plate; the posterior (rear) part is called the alar plate.
    • The optical vesicle (which will eventually become the optic nerve, retina and iris) forms at the basal plate of the prosencephalon.
    • The basal plate becomes the diencephalon.
  • Neurulation

    • This strip is called the neural plate, and it is the origin of the entire nervous system.
    • The neural plate folds outwards to form the neural groove.
    • The anterior (ventral or front) part of the neural tube is called the basal plate; the posterior (dorsal or rear) part is called the alar plate.
    • In general, it entails the cells of the neural plate forming a cord-like structure that migrates inside the embryo and hollows to form the tube.
    • Transverse sections that show the progression of the neural plate into the neural tube.
  • Trochlear (IV) Nerve

    • The human trochlear nerve is derived from the basal plate of the embryonic midbrain.
  • Oculomotor (III) Nerve

    • The occulomotor nerve is derived from the basal plate of the embryonic midbrain.
  • Glossopharyngeal (IX) Nerve

    • The motor division of the glossopharyngeal nerve is derived from the basal plate of the embryonic medulla oblongata, while the sensory division originates from the cranial neural crest.
  • Fourth Week of Development

    • The optical vesicle (which will eventually become the optic nerve, retina, and iris) forms at the basal plate of the prosencephalon.
  • Hemidesmosomes

    • Hemidesmosomes are asymmetrical and connect the basal face of the expressing cell to the extracellular matrix or to other cells.
    • Hemidesmosomes (HD) are very small stud- or rivet-like structures on the inner basal surface of keratinocytes in the epidermis of skin.
    • Hemidesmosomes are asymmetrical and are found in epithelial cells connecting the basal face to other cells.
    • Electron microscopic analysis of the epidermal basement membrane zone (BMZ) reveals that it comprises a narrow and sometimes folded interface between the basal keratinocytes and the dermis.
    • Thin, extracellular, electron-dense lines, parallel to the plasma membrane, subjacent to the outer plaque are visible in one third of HDs and are termed sub-basal dense plates (SBDPs).
  • Peripheral Motor Endings

    • A neuromuscular junction exists between the axon terminal and the motor end plate of a muscle fiber where neurotransmitters are released.
    • A neuromuscular junction is the synapse or junction of the axon terminal of a motor neuron with the motor end plate, as shown in Figures 1 and 2.
    • Acetylcholine diffuses into the synaptic cleft and binds to the nicotinic acetylcholine receptors located on the motor end plate.
    • These receptors open to allow sodium ions to flow in and potassium ions to flow out of the muscle's cytosol, producing a local depolarization of the motor end plate, known as an end-plate potential (EPP).
    • The arrow shows junctional folds with basal lamina.
  • Basal Ganglia

    • One of the most intensively studied functions of the basal ganglia (BG) is its role in controlling precise eye movements.
    • The basal ganglia (or basal nuclei, ) are a group of nuclei of varied origin in the brains of vertebrates that act as a cohesive functional unit.
    • Two schematic drawings of coronal sections of human brain labelling the basal ganglia.
    • The basal nuclei are often referred to as the basal ganglia.
    • The main components of the basal nuclei are labeled in purple.
  • Disorders of the Basal Ganglia

    • Basal ganglia disease refers to physical dysfunctions that occur when basal ganglia fail to suppress unwanted movements.
    • An example of a hypokinetic basal ganglia disease is Parkinsonism.
    • An example of a hyperkinetic basal ganglia disease is Huntington's Disease.
    • The basal ganglia is a collective group of structures in the brain .
    • This is a diagram of the main circuits of the basal ganglia.
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