Attention

Attention is the τ-categorical selection operator on the input/state space of the neural τ³-computer (VI.D52) — the morphism that gates which subset of the system's instantaneous content enters the integrative core supporting Eval^(2) (CC2 of VI.D86). Selective awareness is not a separate faculty: it is the bottleneck through which inputs must pass to participate in the second-order self-evaluation that the constructive consciousness criteria require.

Categorical invariant. Selection morphism A_τ : 𝒞(t) → 𝒞_attended(t) on the instantaneous content space 𝒞 of the τ³-computer, with the attended subgraph being precisely the subset that feeds the recurrent self-evaluation loop required by VI.D86 condition CC2. Attention thereby gates entry to the conscious workspace and, via reward modulation, gates entry to the learning PPAS update.

Primary registry anchor: VI.D52

Supporting items: VI.D86, VI.D69, VI.T38

1. I.K0 — Universe Postulate
2. VI.D15 — Life Sector
3. VI.D52 — Neural Architecture as τ³ Computer
4. VI.D69 — Minimal Conscious Agent — requires centralized integration core
5. VI.D86 — Constructive Consciousness Criteria — CC2 demands Eval^(2) on the attended content
6. VI.T38 — Consciousness as Mixed-Sector Self-Modeling — attention is the gate, not the modeller

Biomarker: Endogenous (top-down): fronto-parietal attention network (dorsal attention network — DAN: intraparietal sulcus, frontal eye fields). Exogenous (bottom-up): ventral attention network (VAN: temporoparietal junction, ventral frontal cortex). Neural signatures: alpha-band desynchronization (8–13 Hz) at attended cortical sites; gamma-band enhancement (30–80 Hz); pupil dilation; thalamic reticular nucleus gating.

Measurable range: Selective attention bandwidth: ~40–60 bits/s entering working memory from a sensory background of ~10⁷ bits/s — a >10⁵-fold compression. Attentional blink: missed second target within 200–500 ms of first. Useful field of view contracts under load. Inattentional blindness: gorillas-on-basketball-court (Simons & Chabris 1999) — content present but not attended is not reported.

Observation method: Behavioral: Posner cueing, attentional blink, change-blindness paradigms, dual-task interference. Imaging: fMRI of DAN/VAN, MEG of alpha desynchronization, EEG of P300/N2pc components. Pharmacological dissection: cholinergic and noradrenergic systems modulate attention — scopolamine impairs, methylphenidate enhances. Lesion: parietal lesions → hemineglect (contralesional space not attended).

Calibration anchor: LG-Y02-kinetic-pseudoscalar-channel

Anchor chain:

1. VI.L18 chirality channel
2. L-handed acetylcholine and noradrenaline as stereospecific neuromodulators of attention gain
3. stereospecific receptor subtypes (M1, α2, β) implementing endogenous gating

Manuscript reference: manuscript-sources/book-06/part06/ch40-neural-systems.tex

Status: Planned

Related glossary entries

• LG-M01-consciousness Consciousness
• LG-M07-constructive-consciousness-criteria Constructive Consciousness Criteria
• LG-M04-learning-consolidation Learning (Consolidation)
• LG-M05-memory Memory
• LG-Y02-kinetic-pseudoscalar-channel Kinetic Pseudoscalar Channel

Referenced by

• LG-M04-learning-consolidation Learning (Consolidation)
• LG-M05-memory Memory
• LG-M07-constructive-consciousness-criteria Constructive Consciousness Criteria
• LG-M09-mixed-sector-self-modeling Mixed-Sector Self-Modeling