"focal regions" is correct and commonly used in written English.
It refers to specific areas or locations that are the center of attention or focus in a sentence or discussion. Example: "The study focused on the focal regions of the brain responsible for decision making." In this sentence, "focal regions" refers to the specific areas of the brain that are the main subject of the study.
Regional inspection also showed different focal regions of sampling.
Clusters of this population generated distinct focal regions termed localized LMRs.
However, we could find distinct focal regions termed LMRs with hundreds of base pairs.
Fedorenko, E., Duncan, J. & Kanwisher, N. Broad domain generality in focal regions of frontal and parietal cortex.
Mice with mutations in gamma-sarcoglycan or delta-sarcoglycan develop cardiomyopathy that is characterized by focal regions of tissue damage.
The minimally invasive endovascular surgical approach offered by the stent-mounted electrode array might enable safe and efficacious stimulation of focal regions in the brain.
Natural features play a pivotal role in the designs for two of the project's other focal regions, New York's Jamaica Bay and Rhode Island's Narragansett Bay.
The somatic DNA methylation (DNAme) landscape is established early in development but remains highly dynamic within focal regions that overlap with gene regulatory elements.
Certain physical phenomena occurring at volcanic focal regions can be expressed in terms of a generalized seismic point source, as the sum of single forces and dipole forces (moment tensor).
WNT medulloblastoma genomes are impoverished of recurrent focal regions of SCNA, exhibiting no significant regions of deletion and only a small subset of focal gains found at comparable frequencies in non-WNT tumours (Supplementary Figs 4, 6 and Supplementary Table 8).
In focal regions of ischemic hearts, however, collagen in increased 2-to 4-fold.
