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S Torii

Publications and source records attributed to S Torii.

7 recordsLinked to original sources
PubMed1978

Intracellular recordings from the motor cortex during EEG arousal in unanaesthetized brain preparations of the cat.

1. Intracellular recordings were made from 92 neurones in the precruciate cortex of encéphale isolé and midpontine pretrigeminal preparations of the cat. 2. All but only one of these cells showed appreciable changes in the membrane potential during the transition from the cortical slow wave phase to the EEG arousal occurring spontaneously or induced by stimulating the midbrain reticular formation. Thus, 38 cells were depolarized (D-type cells), 48 cells hyperpolarized (H-type cells) and 5 cells showed an early hyperpolarization and a later depolarization (mixed type). 3. The latency of intracellular responses to reticular stimulation was shorter in the D-type cells than the H-type or mixed-type cells, and shorter for each of the D- and H-types in the cells of the superficial layers than those of the deep layers. 4. The D-type cells were distributed widely through laminae I to V, but the majority was sampled in lamina II. The H-type cells were located in laminae III-VI with the mode at the upper half of lamina III. The mixed-type cells were mostly located in laminge V and VI. 5. Antidromically identified slow pyramidal tract (PT) cells n=9) all belonged to the D-type, and fast PT cells either to the H- (n=11) or the mixed type (n=4). 6. These results suggest that the EEG arousal is a state composed of both excitatory and inhibitory responses of cortical cells which are processed from the superficial to the deep layers.

Animals↗
PubMed1978

An intracellular analysis of EEG arousal in cat motor cortex.

1. Changes in the resting potential and the effective membrane resistance were measured in 77 cells in cat precruciate cortex during the transition from cortical slow wave phase to EEG arousal. 2. These 77 neurones were classified into the recipient cells of the following five different actions on the EEG arousal: (1) postsynaptic excitation (E cells), (2) postsynaptic inhbition (I cells), (3) disinhibition (DI cells), (4) disfacilitation (DF cells) and (5) disfacilitation followed by excitation (DF-E cells). 3. The location of E cells ranged from laminae I to V, but the majority was found in lamina II. Most I cells were located in the upper half of lamina III, and a few in lamina V. DF, DI and DF-E cells existed deeply from the lower half of lamina III to laminae V-VI. 4. Slow pyramidal tract (PT) cells (n = 6) all belonged to the E cell group, whereas fast PT cells were divided into the DF (n = 10) and DF-E cell groups (n = 4). 5. It is postulated that the EEG arousal is initiated with a direct excitation of laminae I-II cells, followed by excitation and inhibition to the upper lamina III cells and further processed to laminae III-VI cells with indirect excitation, inhibition, disinhibition and disfacilitation. The model of four vertical transmission relays is proposed to depict the casade pattern of information being processed through the cortex during the EEG arousal.

Animals↗
PubMed1977

The youngest free groin flap yet?

A successful free groin flap transfer to the arm in a 3-month-old baby is described. The vessels were large enough for microvascular anastomosis and we believe that there is no minimum age restriction for free flap transfer.

Age Factors↗