2024-03-29T08:41:24Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/1741852019-11-18T14:46:55Zcom_10234_71345com_10234_158176col_10234_163799
00925njm 22002777a 4500
dc
Cuadrado Gómez, Carolina Elizabeth
author
2017-09-21
A large number of studies reveal that emotionally significant events are retained
better than neutral events.
A topic of
interest is the retroactive effect of new emotional
experiences on previous related memories.
Usi
ng fMRI, the aim of this study is
to
investigate the brain areas involved in the memory of: a) stimuli that were associated to
a secondary negative reinforcer
(i.e.
,
a monetary
-
social punishment), and b)
categorically related
-
stimuli presented before the punishment but never associated with
negative reinforcer. To do this
,
participants performed an adapted task of that used
in
Dunsmoor et al. (2015), in which sh
owed retroactive memory enhacement for items
categorically related to punished stimulus. The task consisted on a recognition test of
items associated with punishment, items
were
associated categorical
ly with punished
items but neither assoc
i
a
ted with punis
hment and neutral items. This test was
performed 24h after conditioning. Our b
ehavioral
results showed
better memory for the
punished ca
tegory in the conditioning, but
worse memory for the items belonging to the
punished category in the pre
-
conditioning.
N
euroimaging results showed a different
pattern of brain processing for both kinds of items. Punished stimlui showed activation
putamen, ventral anterior cingulate,
supplementary
motor area, hippocampus, and
frotal gyrus for memory were of the stimuli that
were punished with secondary
reinforcer (a monetary
-
social punishment). However, brain areas involved in the
processing of related
-
stimuli were the amygdala, thalamus, and orbitofrontal cortex.
These results
appears to support the idea that initially weak
memories can be
strengthened if this information later gains meaning.
http://hdl.handle.net/10234/174185
Màster Universitari en Investigació en Cervell i Conducta
Máster universitario en Investigación en Cerebro y Conducta
Master's Degree in Research on the Brain and Behaviour
Emotion
Learning
Memory
Retrospective memory
Can a future event change the pass? An fMRI study