Brain injections are a cornerstone technique in neuroscience research, enabling targeted delivery of viral vectors, tracers, or pharmacological agents into specific brain regions. These injections are used for gene expression studies, optogenetic manipulation, neuronal circuit tracing, or localized drug delivery. Precision in both targeting and depth control is essential to achieve reproducible and interpretable experimental outcomes.
Manual stereotaxic injections are often prone to variability and technical challenges:
- Flat skull positioning of the animal’s head required
- Manual drilling can lead to tissue damage. it requires trained personell
- Manual depth control depends heavily on operator skill and may lead to inconsistent injection depths.
- Even small angular misalignments or inaccuracies in skull leveling can result in off-target placements.
difficulties when working in oblique trajectories due to poor angle resolution, calculation difficulties
- Injections performed without real-time feedback or motion correction can cause tissue damage or imprecise spread of injected material.
- Repeatability between animals or operators is limited, complicating longitudinal or comparative studies.
The Neurostar Robot Stereotaxic System automates the entire injection process, ensuring precision, repeatability, and tissue protection:
- Atlas-guided targeting: Integrated digital brain atlases and coordinate correction ensure accurate targeting even when the skull is not perfectly level.
- Tilt correction and coordinate alignment: Even when the animal’s head is not positioned in a perfectly flat-skull orientation, the Neurostar system automatically adjusts the coordinate system. Using landmark-based atlas correction, the software compensates for pitch, yaw, and roll, ensuring that each injection follows the intended trajectory with micrometer precision.
- Automated depth control: The motorized injector moves with micrometer precision, allowing slow, consistent injection profiles that minimize reflux and tissue damage.
- Reproducible trajectories: Software-defined coordinates and motion parameters can be saved and reused for identical procedures across animals.
- Smart BregmaFinder: Camera-guided Bregma detection ensures user-independent consistency across subjects. Integrated cameras provide experiment monitoring, magnification, and documentation throughout the procedure, enabling real-time visualization and precise alignment.
- Atlas scaling: The software considers the size and age of the animal and adapts the atlas accordingly, ensuring consistent targeting across different developmental stages or species
- Injection control: Continuous and precisely controlled injection rates, even in the picoliter range.
- Injection during movement: The needle can move slowly during injection, ensuring an optimal spread and minimal backflow.
- Precise drilling calculation: Automatic computation of burr holes, even in not perfectly leveled animals
- Automatic Drilling with Breakthrough detection: Simple and precise drilling through automated breakthrough recognition prevents tissue damage
- Automatic synchronization: Drill and injector (needle or capillary) are fully synchronized — no manual reconfiguration or tool exchange after drilling is required.
- Oblique trajectories: The Smart Angle Device enables precise angled injections, allowing researchers to access deep or lateral brain structures that are difficult to reach with conventional perpendicular approaches. The angle adjustment ensures smooth, repeatable movements along defined trajectories while maintaining perfect alignment with the atlas coordinates.
Together, these features enable high-throughput, reproducible, and precise delivery of viral vectors or compounds — reducing user-dependent variability and improving experimental reliability.
