The invention provides anti-UCH-L1 antibodies and anti-GFAP antibodies and their use in vitro detection of UCH-L1 and GFAP, respectively, in a sample from an individual, such as an individual known or suspected of having a brain injury or damage, for example, neurological damage such as mild traumatic brain injury. Also provided are methods, systems and kits for diagnosing brain injury or damage, such as neurological damage, in an individual with the aforementioned antibodies as well as compositions comprising the anti-UCH-L1 antibodies and anti-GFAP antibodies.