Basic Science and Pathogenesis.

Background: Recent studies highlight distinct patterns of cortical atrophy between amnestic (typical) and non-amnestic (atypical, with subtypes: behavioural, dysexecutive, logopenic and visuospatial) clinical phenotypes of Alzheimer's disease (AD). The current study aimed to assess regional MRI patterns of cortical atrophy across AD phenotypes, and their association with amyloid-beta (Aβ), phosphorylated tau (pTau), axonal degeneration (NfL) and microvascular deterioration (COLIV).

Method: Postmortem In-situ 3DT1 3T-MRI data was collected for 33 AD (17 typical, 16 atypical) and 16 control brain donors.

The brain's action-mode network.

The brain is always intrinsically active, using energy at high rates while cycling through global functional modes. Awake brain modes are tied to corresponding behavioural states. During goal-directed behaviour, the brain enters an action-mode of function.

Novel variant alters splicing of in family with features of Loeys-Dietz syndrome.

Loeys-Dietz syndrome (LDS) is a connective tissue disorder representing a wide spectrum of phenotypes, ranging from isolated thoracic aortic aneurysm or dissection to a more severe syndromic presentation with multisystemic involvement. Significant clinical variability has been noted for both related and unrelated individuals with the same pathogenic variant. We report a family of five affected individuals with notable phenotypic variability who appear to have two distinct molecular causes of LDS, one attributable to a missense variant in and the other an intronic variant 6 bp upstream from a splice junction in .

From Moral Injury Vulnerability to Protective Equity: The Voyage Every Surgeon Must Take.

Objective: To examine the relationship between moral injury and surgical practice, further explore the concept of protective equity, and understand its role in mitigating the impact of morally injurious events throughout a surgical career.

Background: Moral injury in healthcare settings has evolved from Jonathan Shay's original definition, modified by Brett Litz and others, to encompass the psychological impact of adverse patient outcomes on medical practitioners. Early career surgeons may be particularly susceptible to moral injury, yet the factors influencing this vulnerability remain poorly understood.