The phrase "a key stimulus for" is correct and usable in written English.
It can be used to indicate something that serves as a significant motivator or catalyst for a particular action or change.
Example: "The new policy was a key stimulus for increased employee productivity across the organization."
Alternatives: "a major driver of" or "a significant catalyst for".
In the nervous system, transcription factors play an important role in coordinating neuronal responses following changes in synaptic activity - a key stimulus for shaping brain development, driving synaptic plasticity, and promoting survival of mature neurons [9].
Stemming the growth in out-of-pocket payments has provided a key stimulus for reform of the health financing system.
TNFα, a key stimulus for HUVEC, was reduced to 12% and 8% of the initial concentration by CG161 and CG300, respectively.
Since hypoxia is likely to be a key stimulus for angiogenesis in CRC, we first investigated the angiogenic gene profile of Caco-2 cells exposed to either hypoxia or the hypoxia mimetic DMOG.
To date, some researchers have addressed the effects of different abiotic environment conditions (Gómez and González 2005; Coesel et al. 2008; Lamers et al. 2010; Ramakrishna et al. 2011) on the accumulation of carotenoids in D. salina, and it is widely accepted that light intensity is a key stimulus for β-carotene overproduction in D. salina (Lamers et al. 2010).
WASHINGTON -- A top Federal Reserve policymaker said Monday the central bank was unlikely to start reducing a key stimulus program for "a few months" because the partial government shutdown has muddied the economic picture.
Sound is a key stimulus, Ms. Morie explained.
WASHINGTON -- Wholesale prices dropped in November for the third straight month, indicating that inflation remains in check as Federal Reserve officials consider reducing a key stimulus program.
Our data indicate a critical role for tissue hypoxia as the key stimulus for the inflammatory response after cardiac surgery rather than other hitherto discussed mechanisms such as contact activation via CPB circuit or endotoxin exposure.
Comprehensive lifestyle interventions are effective in preventing diabetes and restoring glucose regulation; however, the key stimulus for change has not been identified and effects in older individuals are not established.
The letter is believed to be "arguably the key stimulus for the U.S. adoption of serious investigations into nuclear weapons on the eve of the U.S. entry into World War II".
