Final answer:
The spinothalamic tract carries information for pain and temperature from the body and limbs to the brain. It crosses the midline in the spinal cord at the level where the information enters.
Step-by-step explanation:
The spinothalamic tract is responsible for transmitting information about pain and temperature from the body and limbs to the brain. This tract carries sensory signals from the dorsal root ganglia, located in the spinal cord, to the thalamus and then to the somatosensory cortex in the brain. It crosses the midline in the spinal cord at the level where the information enters.