What is the nature of cache memory in Parids? A comment on Chettih et al. 2024.

Recent findings by Chettih et al. (Cell 187: 1922-1935, 2024) from electrophysiological recordings in the hippocampus of black-capped chickadees shed light on the debate about how food-hoarding Parids may remember their cache sites. When birds retrieve caches, a "bar code" is reactivated, which is very similar to the code generated when the same cache was made.

The Effect of Rearing and Adult Environment on HPA Axis Responsivity and Plumage Condition in Laying Hens.

The hypothalamic-pituitary-adrenal (HPA) axis responsivity is influenced by early life experience and also modified by the environment an individual experiences as an adult. Because laying hens are transferred from rearing to laying farms at 16-18 weeks of age, they are well suited to study the interaction effect between early (rearing) and adult (laying) environments on physiology and behaviour. In the European Union, there is a move towards cage-free systems for laying hens, but globally, the majority of layers are kept in conventional or furnished cages.

Functional Differentiation along the Rostro-Caudal Axis of the Avian Hippocampal Formation.

Introduction: Different functional domains can be identified along the longitudinal axis of the mammalian hippocampus. We have recently hypothesized that a similar functional gradient may exist along the longitudinal axis of the avian hippocampal formation (HF) as well. If the 2 gradients are homologous, we would expect the caudal HF to be more responsive to acute stress than the rostral HF.

Identifying the nature of episodic memory deficits in Major Depressive Disorder using a Real-World What-Where-When task.

Deficits in episodic memory have been reported in various psychiatric conditions, including Major Depressive Disorder (MDD). Many widely used episodic memory tests do not have the ability to distinguish between impaired memory of separate components of a real-life event (e.g.

Different memory systems in food-hoarding birds: A response to Pravosudov.

We recently showed that food-hoarding birds use familiarity processes more than recollection processes when remembering the spatial location of their caches (Smulders et al., Animal Cognition 26:1929-1943, 2023). Pravosudov (Learning & Behavior, https://doi.