The phrase "aligned to the first" is correct and usable in written English.
It can be used when discussing the alignment or correspondence of something to a primary reference point or initial item in a sequence.
Example: "The results of the experiment were aligned to the first hypothesis proposed by the research team."
Alternatives: "aligned with the first" or "corresponding to the first".
Activity in all panels is aligned to the first drop of reward delivery, shown by arrows and dashed lines.
A metallic arm, with an 1 mm diameter active tip attached to the load cell (5 Kilo-newton), was aligned to the first metal base so its active tip would only touch the post during testing.
The images were corrected for the acquisition delay between slices, aligned to the first image of each session for motion correction and spatially normalized to the standard Montreal Neurological Institute (MNI) template in SPM5.
All EPI volumes were aligned to the first volume acquired for each participant and a mean EPI image generated after realignment.
Then, all the other FA maps were aligned to the first FA map using rigid-body registration with six degrees of freedom.
(C ) Activity aligned to the first touch in a trial (720 responses; two animals, three sessions, six electrode shanks).
In raw sequence alignments we also found reads aligned to the second-longest polyA run, 83bp at chr6:160521756–160521835, but only one junction with this mapping was unique to a tumour and so appeared as a candidate junction.
An external tibial alignment system attached to the proximal tibia and the ankle and aligned to the second metatarsal was used in every patient.
Our second contribution is a novel sheared reconstruction filter that is aligned to the first-order direction of motion and enables even lower sampling rates.
Markers within the reported QTL regions were aligned to the third draft of the bovine genome sequence assembly (Btau 3.1) to obtain the approximate position of these QTL in Mb, and these are reported in Table S4.
For example, within a delay limit of two units, the first time spot of one series might be aligned to the third time spot of the other series, thus maximizing their LS.
