Joseph LeDoux’s theories on consciousness and emotions

In the last post, I mentioned that I was reading Joseph LeDoux's new book, The Deep History of Ourselves: The Four-Billion-Year Story of How We Got Conscious Brains.  There's a lot of interesting stuff in this book.  As its title implies, it starts early in evolution, providing a lot of information on early life, although … Continue reading Joseph LeDoux’s theories on consciousness and emotions

Dehaene’s global neuronal workspace theory

I just finished reading Stanislas Dehaene's Consciousness and the Brain.  Dehaene is a French psychologist and cognitive neuroscientist who is bullish on the idea of consciousness being something that can be scientifically investigated.  It's an interesting book, one that I recommend for anyone interested in the science of consciousness. Dehaene accomplishes his scientific investigation by … Continue reading Dehaene’s global neuronal workspace theory

The sensorium, the motorium, and the planner

I've been reading Gerhard Roth's The Long Evolution of Brains and Minds. This a technical and, unfortunately, expensive book, not one aimed at general audiences, but it has a lot of interesting concepts.  A couple that Roth mentions are the terms "sensorium" and "motorium." The sensorium refers to the sum total of an organism's perceptions, … Continue reading The sensorium, the motorium, and the planner

Did smell lead to consciousness?

Smell has apparently always been a peculiar sense.  The sensory pathway of smell information to the brain runs completely independent from the other senses.  The pathways for the other senses run through the midbrain and thalamus and are then relayed to cortical regions.  But smell goes to the olfactory bulb behind the nose, and from … Continue reading Did smell lead to consciousness?

Is the brainstem conscious?

(Warning: neuroscience weeds and references to gruesome animal research.) The vast majority of neuroscientists see consciousness as a cortical phenomenon.  It may be crucially dependent on sub-cortical and sub-cerebral structures, but subjective experience itself exists mainly or entirely in the neocortex.  In this view, the brainstem only produces reflex responses, with anything more sophisticated coming … Continue reading Is the brainstem conscious?

Consciousness lies in the eye of the beholder

There are few things that everyone who ponders consciousness can agree on.  It's a topic where debates on the very definition of the subject are common.  The only definitions that seem to command near universal assent are the ones oriented toward phenomenology, such as "subjective experience" or "something it is like."  And even then, the … Continue reading Consciousness lies in the eye of the beholder

A qualified recommendation: Consciousness Demystified

Consciousness Demystified cover

A couple of years ago I did a series of posts inspired by Todd Feinberg and Jon Mallatt's excellent  The Ancient Origins of Consciousness, a book on the evolution of animal consciousness.  Somewhat building on what I had read in Antonio Damasio's Self Comes to Mind, it was a pivotal point in my exploration of … Continue reading A qualified recommendation: Consciousness Demystified