Unit 6 Flashcards
(103 cards)
Nervous System
A conglomeration of billions of cells specifically designed to provide a communication network within the human body; where all movements begin.
Human Movement System
The combination and interrelation of the nervous, muscular, and skeletal systems.
Two parts of the nervous system
1) central nervous system - composed of brain & spinal cord; primary decision maker
2) peripheral nervous system - contains only nerves & connects the brain and spinal cord (CNS) to the rest of the body; sends messages to CNS & carry out actions from CNS
Sensory Function
The ability of the nervous system to sense changes in either the internal or external environment.
Integrative Function
The ability of the nervous system to analyze and interpret sensory information to allow for proper decision making, which produces the appropriate response.
Motor Function
The neuromuscular response to the sensory information.
Proprioception
The cumulative sensory input to the CNS from all mechanoreceptors that sense body position and limb movement.
Neuron
The functional unit of the nervous system.
Sensory (afferent) Neurons
Transmit nerve impulses from effector sites (such as muscles & organs) via receptors to the brain and spinal cord; receive information from the environment and the body and send up to the brain.
Interneurons
Transmit nerve impulses from one neuron to another; transmit messages from sensory neurons to motor neurons.
Motor (efferent) Neurons
Transmit nerve impulses from the brain and spinal cord to effector sites; send messages from the brain to the body.
Central Nervous System
The portion of the nervous system that consists of the brain and spinal cord.
Peripheral Nervous System
Cranial and spinal nerves that spread throughout the body.
Mechanoreceptors
Sensory receptors responsible for sensing distortion in body tissues.
Where are mechanoreceptors located? And what 3 things do they include?
1) located in muscles, tendons, ligaments, and joint capsules
2) include muscle spindles, Golgi tendon organs, and joint receptors
Golgi Tendon Organs (GTO)
Receptors sensitive to change in tension of the muscle and the rate of that change; sense tension & pressure within muscles & connective tissue; protective mechanism forces muscles to relax when stimulated
Muscle Spindles
Receptors sensitive to change in length of the muscle and the rate of that change; sense length in muscle; protective mechanism forces your muscles to tighten when stimulated.
Joint Receptors
Receptors surrounding a joint that respond to pressure, acceleration, and deceleration of the joint; protective mechanism that protects the joints from a compromising situation.
Skeletal System
The body’s framework, composed of bones and joints; provide shape and form for our bodies; mainly responsible for support, protection, & allowing movement to occur.
Two divisions of the skeletal system
1) axial skeleton - consist of the skull, rib cage, and vertebral column
2) appendicular skeleton - includes the upper and lower extremities
Bones
Provide a resting ground for muscles and protection of vital organs.
Two functions of bones
1) leverage for our muscles
2) provide support that directly affect our posture
Joints
Junctions of bones, muscles, and connective tissue at which movement occurs; also known as articulation.
Three types of bone growth
1) remodeling - process of resorption and formation of bone
2) osteoclasts - type of bone cell that removes bone tissue
3) osteoblasts - type of cell that is responsible for bone formation