When an animal or human encounters a sudden and intense external stimulus, such as a deafening roar or a blinding flash of light, the body reacts immediately and without hesitation. An animal might instantly tense its muscles and jump in surprise; a human might involuntarily tremble, blink, or even experience a sudden acceleration of their heartbeat. This is the basic startle reflex. This primitive reaction actually hides the brain's unique "filtering" ability—sensory-motor gating.

In the field of cognitive neuroscience, evaluating animals' ability to recognize and remember objects is of great significance for exploring learning and memory mechanisms, studying neurodegenerative diseases, and conducting drug research and development.As a simple and effective behavioral experimental method, the Novel Object Recognition Test (NOR) has gradually attracted widespread attention from researchers.

As the core organ of the organism's neural control, the brain plays a vital role in behavioral activities, sensory feedback, and psychological activities.The study of brain function and structure has always been the focus of researchers. Traditional research tools include magnetic resonance imaging (MRI) and electroencephalogram (EEG).

Recently, a research team from the School of Traditional Chinese Medicine of Shenyang Pharmaceutical University published an article titled "Gut opportunistic pathogens contribute to high-altitude pulmonary edema by elevating lysophosphatidylcholines and inducing inflammation" in the journal Microbiology Spectrum. The study revealed the mechanism by which intestinal flora (such as Klebsiella and Escherichia coli) promote high-altitude pulmonary edema (HAPE) by elevating lysophosphatidylcholine (LPC) levels and inducing inflammation.

In the field of neuroscience research, it is crucial to find a classic experimental method that can effectively assess the anxiety level of animals.As a commonly used behavioral experimental method, the Elevated Plus Maze (EPM) has become a powerful tool for studying anxiety behavior and related drug screening since its introduction in the 1970s.

At a cancer research center, researchers use ultrahigh-frequency ultrasound imaging to precisely locate tumor boundaries, then perform targeted ablation using accompanying ultrasound therapy equipment and observe the ablation effects through ultrasound imaging. This closed-loop "imaging-therapy-imaging" system is becoming a new paradigm in life science research. This article will focus on the ultrahigh-frequency small animal ultrasound imaging system and explain how it is building a new ultrasound research ecosystem, driving breakthroughs in cardiovascular, oncology, and embryology research.