Results: 5

1.
Fig. 1.

Fig. 1. From: Declarative memory consolidation in humans: A prospective functional magnetic resonance imaging study.

FMRI results: recognition effect. Contrasting confident recent hits and misses (day 1), we observed, in addition to other areas (cf. Table 2), bilateral medial temporal lobe activations centered in the hippocampus (Hi).

A. Takashima, et al. Proc Natl Acad Sci U S A. 2006 January 17;103(3):756-761.
2.
Fig. 4.

Fig. 4. From: Declarative memory consolidation in humans: A prospective functional magnetic resonance imaging study.

FMRI results: correlation between hippocampal and ventral medial prefrontal time effects (day 1 to day 90). Scatter plot with a linear regression line of parameter estimates (arbitrary units) derived from local maxima of the time effects (day 1 to day 90) in the hippocampus and the ventral medial prefrontal cortex (see Results for details).

A. Takashima, et al. Proc Natl Acad Sci U S A. 2006 January 17;103(3):756-761.
3.
Fig. 2.

Fig. 2. From: Declarative memory consolidation in humans: A prospective functional magnetic resonance imaging study.

Behavioral and fMRI results: sleep effect. (a) Scatter plot of recognition memory performance (d′) on day 1 for recent and remote items related to individual slow-wave sleep duration. (b) A correlation based on weaker responses to confident remote hits as compared to confident recent hits with longer slow-wave sleep duration was observed in the left hippocampus (Hi).

A. Takashima, et al. Proc Natl Acad Sci U S A. 2006 January 17;103(3):756-761.
4.
Fig. 3.

Fig. 3. From: Declarative memory consolidation in humans: A prospective functional magnetic resonance imaging study.

FMRI results: time effect (day 1 to day 90). (a) The ventral medial prefrontal region showed an increase in activity related to confident remote hits over time. (b) In contrast, the hippocampus showed a decline in activity related to confident remote hits over time. Note that we fitted power laws [i.e., Y(t) = a + b × tc] to the observations depicted in Left for descriptive purposes only (error bars = standard errors of the mean).

A. Takashima, et al. Proc Natl Acad Sci U S A. 2006 January 17;103(3):756-761.
5.
Fig. 5.

Fig. 5. From: Declarative memory consolidation in humans: A prospective functional magnetic resonance imaging study.

Experimental paradigm. On day 1, subjects were instructed to memorize 320 randomly selected photographs (i.e., “remote”). After the subsequent rest/nap, they studied 80 new photographs (i.e., “recent” of day 1) before scanning. During scanning, subjects performed a recognition memory test on randomly intermixed 80 remote, 80 recent, and 80 new photographs with three response options: (i) picture seen before with confidence, (ii) picture less certain to be seen before or not, and (iii) picture not seen before with confidence. This sequence of prescan study phase of new photographs and recognition memory test in the scanner was repeated on days 2, 30, and 90.

A. Takashima, et al. Proc Natl Acad Sci U S A. 2006 January 17;103(3):756-761.

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