Joseph LeDoux

The amygdala/fear-conditioning researcher who, in LeDoux (2012), argues the field should stop calling it fear. See survival-circuits.

The position, and why it resists easy placement

LeDoux is routinely filed with the basic-emotion/locationist camp — he is the amygdala-and-fear scientist — and his actual position in this paper is close to the opposite. He does not defend fear as a natural kind, nor the amygdala as a fear module. He agrees with Barrett that “the foundation of support for the idea that basic emotions, as conventionally conceived, have dedicated neural circuits is weak.”

What he refuses is the inference from no dedicated basic-emotion circuits to no innate emotion-relevant circuits. The mammalian brain does have conserved innate circuits; basic-emotion categories, derived from introspective English feeling words, are just a poor description of them. Hence a third position in locationist-vs-constructionist-brain-emotion: anti-locationist about categories, realist about circuits.

Where he splits from Barrett: resolution

The methodological disagreement is specific and worth keeping distinct from the theoretical one. Barrett and Lindquist et al. argue from similar fMRI activation across emotion categories to shared, domain-general mechanism. LeDoux rejects the inference: “imaging does not have the resolution necessary to conclude that the similarity of activation in different states means similar neural mechanisms.” His evidence is Lin et al. (2011) — distinct mating and intruder-attack cell populations within the ventromedial hypothalamus, invisible at area level. See amygdala.

So both agree the locationist picture fails; they disagree about whether the constructionist alternative has been established by the imaging data, and LeDoux thinks the relevant specificity lives below the voxel.

Where he splits from Craig: lobe

LeDoux’s feelings are constituted in a prefrontal/parietal cognitive workspace, not the anterior insula — a direct opposition to Craig’s AIC-centred global-emotional-moment, despite the two constructs being structurally near-identical. Neither cites the other. See where-are-feelings-constituted, global-organismic-state.

Where he splits from Panksepp: epistemics

The sharpest polemic in the paper. Against Panksepp’s affective-consciousness program (and popular writing by Bekoff, Masson & McCarthy), LeDoux holds that “it’s hard to justify anthropomorphic speculation in science” and “we can never know whether another animal has conscious emotional feelings.” The tractable question is whether the mechanisms underlying human feelings exist in other animals — noting DLPFC is absent in most mammals and that humans alone have language. See can-we-know-animal-feelings.

Where he splits from Scarantino: only on the word

The wiki’s one direct commentary on him — Scarantino (2018), in a themed issue LeDoux co-edited — makes a case worth recording on this page because it constrains how much of the above is a claim about the brain.

Scarantino, a basic emotion theorist, reports agreement with LeDoux on nearly the whole architecture: different circuits for adaptive behaviour and for feelings (both against Panksepp); a reflexively-generated global motive state that need not be felt; a general-purpose cognitive system regulating it into instrumental behaviour; feelings via higher-order representation. What remains is what to call the subcortical mechanism — LeDoux’s defense survival circuit is Scarantino’s basic fear.

The root of the disagreement is a difference about the explanandum: for LeDoux the central task of emotion theory is explaining how feelings come about, so “fear” names the feeling; for Scarantino it is explaining how emotions motivate behaviour, so “fear” (qualified) names the motive state. See what-should-emotion-terms-refer-to.

Two things this surfaces about LeDoux’s position:

• The reform is pragmatic, not theoretical, and he says so. He abandoned his own earlier implicit emotion (motive state) / explicit emotion (state of consciousness) distinction — the one running through The Emotional Brain (1996) and Synaptic Self (2002) — not because it was wrong but because it was misread: “although I consistently emphasized that the amygdala circuits operate nonconsciously, I was often described in both lay and scientific contexts as having shown how feelings of fear emerge from the amygdala.” Scarantino’s counter is that common sense should not legislate scientific definitions (Quine; the Pluto demotion), and that most of affective science already separates emotion from feeling — so LeDoux’s convention may cause the confusion it was designed to prevent.
• The 2017 position may include the insula. Scarantino cites LeDoux & Brown (2017) for locating higher-order representation in “general networks of cognition” spanning prefrontal, posterior parietal, and insular cortex. The 2012 paper gives the insula no role at all. Whether this is a shift or the insula entering as a workspace component rather than as Craig’s medium of feeling is not decidable from the commentary, and it bears on where-are-feelings-constituted and can-we-know-animal-feelings. Flagged on higher-order-theory-of-consciousness; needs LeDoux & Brown (2017), which is not in raw/.

Inherited from the appraisal tradition

Despite the animal-circuit framing, the feelings model is recognizably two-factor: a state, plus its appraisal and labeling. LeDoux cites Schachter (1975) directly, and treats emotion words as adding specificity to an otherwise dimensional experience. See stanley-schachter, cognitive-appraisal, dror-2017-two-factors. His treatment of generalized arousal also engages the Cannon lineage — but with survival-circuit-specific components included, so the state is not undifferentiated.