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Questions and Answers
Qui a décrit pour la première fois les cellules de Purkinje ?
Qui a décrit pour la première fois les cellules de Purkinje ?
- Jan Evangelista Purkyně en 1837 (correct)
- Johannes Peter Müller en 1837
- Santiago Ramón y Cajal en 1906
- Roger Sperry en 1963
Quel est l'effet des cellules de Purkinje sur leurs cibles ?
Quel est l'effet des cellules de Purkinje sur leurs cibles ?
- Excitatif
- Inhibiteur (correct)
- Neutre
- Variable
Combien d'épines peuvent être présentes sur une seule cellule de Purkinje chez l'homme ?
Combien d'épines peuvent être présentes sur une seule cellule de Purkinje chez l'homme ?
- 20 000
- 100 000
- 200 000 (correct)
- 500 000
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Study Notes
- Purkinje cells are distinctive neurons in the brain.
- They were first described by Jan Evangelista Purkyně in 1837.
- Their dendrites form a dense planar network with parallel fibers passing through.
- They receive more synaptic inputs than any other type of cell in the brain.
- The estimates of spines on a single human Purkinje cell reach 200,000.
- Their cell bodies are grouped in a single layer of the cerebellar cortex called the Purkinje layer.
- They emit axonal collaterals that affect neighboring parts of the cortex.
- Their axons travel to the deep cerebellar nuclei and establish multiple contacts with different types of nuclear cells.
- Purkinje cells use GABA as a neurotransmitter.
- They have inhibitory effects on their targets.
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