Anatomy & Physiology
A practical map of the body's structures and systems
Lesson 12 of 20
Proprioceptors & reflexes
Proprioception is the sense of body position and movement, supported by receptors in muscles, tendons, joints, and other tissues. Reflexes are rapid, patterned responses that can occur without deliberate conscious planning. Sensory information is integrated through neural pathways, often involving the spinal cord. These concepts help explain protective responses and movement awareness without reducing them to simple switches.
Key points
- Muscle spindles respond to muscle length and changes in length.
- Golgi tendon organs respond to tension in the muscle-tendon unit.
- Joint and skin receptors add information about position, pressure, and movement.
- A reflex arc includes a receptor, sensory neuron, integration, motor neuron, and effector.
- Reflexes can be modified by higher centers and vary across people and circumstances.
Key terms
- Proprioception
- Perception of body position and movement.
- Muscle spindle
- Receptor within muscle that senses length and length change.
- Golgi tendon organ
- Receptor near a tendon that senses tension in the muscle-tendon unit.
- Reflex arc
- Neural pathway producing a reflex response from stimulus to effector.
- Integration center
- Neural site where incoming information contributes to a response.
Memory tip
Position sense is built from many signals, not one receptor alone.
Clinical note
Avoid claims that a specific stroke reliably switches a reflex or resets the nervous system.
Unit checkpoint
Lock it in: match the terms, then test yourself.