Ultrastructure of the cerebral cortex of the cat in the early recovery period after short-term anoxia

The ultrastructure of cat sensomotor cortex has been studied during a 15-minute recovery after 2.5-6-minute oxygen supply cessation. An increase of osmopholia of free and endoplasmic reticulum bound ribosomes was detected in addition to a great number of altered mitochondria with longitudinal crystal arrangement. Besides, numerous activated synapses, local destructive changes of membrane complexes in dendrite and myelinated axons cytoplasm and glycogen granule accumulation in neuroglia were noticed. During the recovery period more prominent changes were shown after a 6-minute anoxia than after a 2.5-minute one.