Dreams of Subjects With Bilateral Hippocampal Lesions

Torda, Clara

doi:10.1111/j.1600-0447.1969.tb07128.x

Cited by 21 publications

(14 citation statements)

References 42 publications

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“…While lower B scores are related to a smaller volume of LA and to a decreased microstructural integrity (i.e., a higher Mean Diffusivity) of RA, an intrinsically asymmetrical mechanism seems to control the relationship with the hippocampus, since we observed a positive relation with the RH volume and a negative one with the LH volume. This last finding seems coherent with the only study, to the best of our knowledge, on the dreams of patients with hippocampal damage [Torda, 1969]. These patients reported dreams which were short, stereotyped, repetitious, unemotional and lacking day-residues or symbolic elaborations.…”

Section: Discussionsupporting

confidence: 79%

Amygdala and hippocampus volumetry and diffusivity in relation to dreaming

Gennaro

Cipolli

Cherubini

et al. 2010

Human Brain Mapping

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Microstructural analyses by MRI brain scans and by DTI analysis of MR images were used to investigate the possible relationship between deep gray matter structures (amygdala and hippocampus) and dreaming in healthy subjects. Thirty-four subjects ranging in age 20s to 70s underwent to a MRI protocol for the assessment of volume and mean diffusivity (MD) in the amygdala and hippocampus and were asked to fill out a dream diary via audiotape recording upon morning awakening for two weeks. Multiple regression analyses evaluated the relationships between anatomical measures and quantitative and qualitative measures of the reported dreams. The main result points to a dissociation between some quantitative and qualitative aspects of dream reports. While the mean number of dreams recalled per day did not show any significant relationship with the neuroanatomical measures, significant associations with some qualitative features of the recalled dreams (emotional load, bizarreness, and vividness) and, to some extent, with the length of dream reports were observed. Particularly, a higher MD of the left amygdala, reflecting a decreased microstructural integrity, was associated with shorter dream reports and lower scores on emotional load. Bizarreness of dream reports was negatively correlated with the left amygdala volume and positively correlated with the right amygdala MD. Some specific, although weaker, relationships were also found between bizarreness and hippocampal measures. These findings indicate some direct relationships between volumetric and ultrastructural measures of the hippocampus-amygdala complex and specific qualitative features of dreaming.

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Section: Discussionsupporting

confidence: 79%

Amygdala and hippocampus volumetry and diffusivity in relation to dreaming

Gennaro

Cipolli

Cherubini

et al. 2010

Human Brain Mapping

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“…A previous study found that dreams are affected in patients whose hippocampal regions are damaged [24]. Therefore involvement of hippocampus should be evaluated in depressive patients presenting with forgetfulness.…”

Section: Discussionmentioning

confidence: 99%

Association of Lack of Dreaming and Forgetfulness: Presentation of a Case with Depression

Almış¹,

Çelik²,

Cumurcu³

et al. 2015

Med-Science

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Although the aim and the function of sleeping is not definitely explained, its relation with memory has been discussed for more than 200 years. We want to discuss literature on dreammemory relation in the light of a depression case who was complaining from forgetfulness.We present a depression case who presented with complaints of forgetfulness and lack of dreaming and both complaints were relieved after treatment with fluoxetine 20 mg/day. We believe that investigating dreaming in patients who have memory disturbances can shade light on dreaming-memory relationship.

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“…Complicating matters is that REM sleep and hippocampal activity are not completely linked and each can occur independent of the other (Moroni et al ., ; Diekelmann and Born, ; Torda, ). Additionally, as evidenced below, sleep images are not solely the purview of REM sleep or hippocampal function, but occur in various stages of sleep and can be independent of hippocampal function (Stickgold, ) – so simply having an image in mind during sleep is not evidence of hippocampal function or that the integrative function of the type I am discussing has or has not occurred…”

Section: The Impact On Dreamingmentioning

confidence: 99%

“…In regards to narrative scenes specifically, it has been demonstrated that after attempting a maze, those subjects who took a nap and dreamt about mazes showed up to a ten-fold improvement in the maze after waking compared to those that either did not take a nap, or those that did sleep but did not have a dream containing mazes (Wamsley et al, 2010b). 4 Complicating matters is that REM sleep and hippocampal activity are not completely linked and each can occur independent of the other (Moroni et al, 2007;Diekelmann and Born, 2010;Torda, 1969). Additionally, as evidenced below, sleep images are not solely the purview of REM sleep or hippocampal function, but occur in various stages of sleep and can be independent of hippocampal function (Stickgold, 2000) so simply having an image in mind during sleep is not evidence of hippocampal function or that the integrative function of the type I am discussing has or has not occurred.…”

Section: The Impact On Dreamingmentioning

confidence: 99%

The hippocampus facilitates integration within a symbolic field

Cornelius¹

2017

The International Journal of Psychoanalysis

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Translations of summaryThis paper attempts to elaborate a fundamental brain mechanism involved in the creation and maintenance of symbolic fields of thought. It will integrate theories of psychic spaces as explored by Donald Winnicott and Wilfred Bion with the neuroscientific examinations of those with bilateral hippocampal injury to show how evidence from both disciplines sheds important light on this aspect of mind. Possibly originating as a way of maintaining an oriented, first person psychic map, this capacity allows individuals a dynamic narrative access to a realm of layered elements and their connections. If the proposed hypothesis is correct, the hippocampus facilitates the integration of this symbolic field of mind, where narrative forms of thinking, creativity, memory, and dreaming are intertwined. Without the hippocampus, there is an inability to engage many typical forms of thought itself. Also, noting the ways these individuals are not impaired supports theories about other faculties of mind, providing insight into their possible roles within human thought. The evidence of different systems working in conjunction with the symbolic field provides tantalizing clues about these fundamental mechanisms of brain and mind that are normally seamlessly integrated, and hints at future areas of clinical and laboratory research, both within neuroscience and psychoanalysis.

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Dreams of Subjects With Bilateral Hippocampal Lesions

Cited by 21 publications

References 42 publications

Amygdala and hippocampus volumetry and diffusivity in relation to dreaming

Amygdala and hippocampus volumetry and diffusivity in relation to dreaming

Association of Lack of Dreaming and Forgetfulness: Presentation of a Case with Depression

The hippocampus facilitates integration within a symbolic field

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