Flashcards
neuromuscular system
Flashcards do conjunto (12)
- 1autonomic nervous system and neuromuscular systemautonomic system: regulates function of internal organs and controls some of our skeletal muscles
neuromuscular system: nervous system and the muscles work together to allow movement - 2what is the sympathetic and parasympathetic nervous system?they help the neuromuscular system to prepare the body for exercise
sympathetic: prepares for exercise (fight or flight response)
parasympathetic: relaxes body slows down energy functions - 3what are slow twitch fibres?-slower contraction speed then fast twitch
-better adapted for low intensity exercise e.g long distance
produce energy aerobically - 4what are fast twitch fibres?-greater force of contraction
-fatigue quickly
-produce energy anaerobically
-Type llA: more resistant to fatigue, longer burst of energy
-Type llB: fatigue quickly, quick short bursts of energy - 5effect of training on fibre typehypertrophy: muscle becomes bigger and stronger
meaning muscle fibre size increases if muscle undergoes hypertrophy - 6the motor unit-consists of motor neurone and its muscle fibres
-only one muscle fibre type can be in one motor unit
-muscle fibres work with nervous system so contraction can occur - 7the all or none law-once motor neurone stimulates muscle fibres either all of them contract or none
-minimum amount of stimulation (threshold) is required to start contraction
-if sequence of impulses meet this threshold then all contract if not none do - 8what is wave summation?when there is a repeated nerve impulse with no time to relax so a smooth, sustained contraction occurs rather than twitches creating a tetanic contraction
- 9what is spatial summation?when the strength of a contraction changes by altering the number and size of the muscle units
- 10what is PNF (proprioceptive neuromuscular facilitation)-advanced stretching technique
-also increases range of motion
-CRAC technique is the most common - 11what is the role of muscle spindles (proprioceptor) in pnfprovide info to CNS about how fast and far a muscle is being stretched. CNS then sends an impulse back to muscle telling it to contract. Triggers stretch reflex preventing over stretching
- 12what is the role of Golgi tendon organs (proprioceptor) in pnfthey detect levels of tension in a muscle. When muscle contracted isometrically in PNF they sense increase in muscle tension and sned inhibitory signals to brain allowing antagonist muscle to relax and lengthen (aka autogenic inhibitation)
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- Descrição
- A level Physical Education (PE) (NWY) FlashCards sobre neuromuscular system, criado por Lucinda Adams em 12-04-2017.
- Criado por
- Lucinda Adams
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