Final answer:
The brain receives sensory information from Golgi Tendon Organs and Muscle Spindles, which monitor muscle contraction forces and stretching respectively.
Step-by-step explanation:
The brain receives sensory information from structures contained within muscles and tendons known as Golgi Tendon Organs and Muscle Spindles. Golgi Tendon Organs are important for detecting the force of muscle contraction, while Muscle Spindles are receptors that detect the amount of stretch or lengthening of muscles.
These structures play a crucial role in proprioception, which is the sense of the relative position of one's own body parts and strength of effort being employed in movement.