How The Brain Deals With Grief, Listening To Noisy Fish Sounds. May 6, 2022, Part 1 - Science Friday Recap
Podcast: Science Friday
Published: 2022-05-06
Duration: 2819
Guests: Mary Frances O'Connor, Aaron Rice
What Happened
Mary-Frances O'Connor, a seasoned neuroscientist and author of 'The Grieving Brain,' delves into the complex ways grief affects the human brain. She explains that grief and grieving are distinct; grief is an immediate emotional response, while grieving is the long-term process of adapting to loss. O'Connor's research, which began with the advent of fMRI technology, reveals that the brain rewires itself after losing a loved one, a physiological adaptation necessary for emotional healing.
O'Connor points out that avoiding reminders of the deceased can hinder the brain's adjustment process. Her studies have shown that grief impacts physiological systems, such as heart rate and cortisol levels, increasing mortality risk among widowed individuals, especially men. She also distinguishes grief from depression and PTSD, each having unique neurobiological markers, and notes that while antidepressants might help with co-existing depression, they don't alleviate the yearning caused by grief.
The episode shifts focus to the noisy underwater world, where Aaron Rice, from the Cornell Lab of Ornithology, sheds light on the unexpected acoustic capabilities of fish. Contrary to the quiet world portrayed in Jacques Cousteau's films, many fish species, especially ray-finned fish, produce sounds for communication. These sounds, which can be as loud as 165 decibels, serve various purposes, from mating calls to territorial warnings.
Fish produce these sounds using different mechanisms, including specialized swim bladder muscles, grinding teeth, and even releasing bubbles. The swim bladder not only aids buoyancy but also amplifies sounds, with some fish having muscles that are among the fastest contracting in vertebrates. Rice highlights the Plain Fin midshipmen fish, which can hum continuously for over an hour to attract mates, and the black drum fish, known for its jackhammer-like noise during spawning.
The field of fish bioacoustics is gaining traction as researchers uncover the complex soundscapes of aquatic ecosystems. Despite advanced recording technologies, identifying specific species producing these sounds remains challenging. Nonetheless, this growing body of knowledge underscores the vibrant acoustic life hidden beneath the waves, challenging previous perceptions of the underwater environment.
The pandemic's impact on grieving processes is also discussed, with O'Connor noting the complications arising from social distancing and disrupted mourning traditions. The bereavement disparity among racial and ethnic minorities is highlighted, with these communities often facing more intense grief due to traumatic deaths. Future research aims to explore the integration of psychological and physiological responses in grieving, emphasizing the need for a comprehensive understanding of this profound human experience.
Key Insights
- Mary-Frances O'Connor's research shows that grief involves the brain's rewiring process, which is crucial for adapting to the absence of a loved one. This adaptation involves complex brain functions like memory and perspective-taking, affecting physiological processes such as heart rate regulation.
- The brain uses two streams of information during grief: the memory of the loved one and the bond suggesting their continued presence. Avoiding reminders of the deceased can impede the brain's ability to adjust, highlighting the importance of confronting memories to facilitate healing.
- Aaron Rice reveals that two-thirds of ray-finned fish families are known to produce sounds or have the capability. These sounds, ranging from mating calls to territorial disputes, are produced using various body parts, like swim bladders, teeth, and tendons, and can reach volumes as high as 165 decibels.
- The pandemic has complicated grieving processes, with social distancing and disrupted mourning practices impacting bereavement. This is particularly challenging for racial and ethnic minorities, who face both health disparities and more intense grief from traumatic losses.