Sports, Exercise & Health Science SL
Sports, Exercise & Health Science SL
18
Chapters
196
Notes
Chapter 1 - Musculoskeletal Anatomy
Chapter 1 - Musculoskeletal Anatomy
Chapter 2 - Cardio - Respiratory Exercise Physiology
Chapter 2 - Cardio - Respiratory Exercise Physiology
Chapter 3 - Nutrition & Energy Systems
Chapter 3 - Nutrition & Energy Systems
Chapter 4 - Movement Analysis
Chapter 4 - Movement Analysis
Chapter 5 - Skill In Sport
Chapter 5 - Skill In Sport
Chapter 6 - Measurement & Evaluation Of Human Performance
Chapter 6 - Measurement & Evaluation Of Human Performance
Chapter 7 - Training To Optimize Physiological Performance
Chapter 7 - Training To Optimize Physiological Performance
Chapter 8 - Environmental Factors & Performance
Chapter 8 - Environmental Factors & Performance
Chapter 9 - Non-Nutritional Ergogenic Aids
Chapter 9 - Non-Nutritional Ergogenic Aids
Chapter 10 - Individual Differences In Sport
Chapter 10 - Individual Differences In Sport
Chapter 11 - Motivation In Sport & Exercise
Chapter 11 - Motivation In Sport & Exercise
Chapter 12 - Arousal, Anxiety & Performance
Chapter 12 - Arousal, Anxiety & Performance
Chapter 13 - Psychological Skills Training
Chapter 13 - Psychological Skills Training
Chapter 14 - Overtraining, Stress & Burnout In Adolescent Athletes
Chapter 14 - Overtraining, Stress & Burnout In Adolescent Athletes
Chapter 15 - Physical Activity & Health
Chapter 15 - Physical Activity & Health
Chapter 16 - Nutrition For Sport & Exercise
Chapter 16 - Nutrition For Sport & Exercise
Chapter 17 - Internal Assessment & Practical Work
Chapter 17 - Internal Assessment & Practical Work
Chapter 18 - Perparing for your exams
Chapter 18 - Perparing for your exams
IB Resources
Chapter 4 - Movement Analysis
Sports, Exercise & Health Science SL
Sports, Exercise & Health Science SL

Chapter 4 - Movement Analysis

Unlocking the Secrets of The Nervous System

Word Count Emoji
624 words
Reading Time Emoji
4 mins read
Updated at Emoji
Last edited on 14th Jun 2024

Neuron anatomy dive into details ✨

  • Soma (Cell Body)

    • Resides in spinal cord or close clusters named ganglia.
  • Dendrites

    • Connect neurons, sharing the latest gossip (information).
  • Axon

    • Nerve signal's superhighway.
    • Rocking a protective coat, the myelin (keeps signals safe & sound).
    • Myelin has rest stops called nodes of Ranvier for signal boost!
  • Neuromuscular Junction

    • Where neuron and muscle meet and greet.
    • Between them is the synapse, a tiny gap for passing the electrical 'hello' to the muscle.

🤔 Real-world example: Imagine the axon as an insulated electric wire. The myelin is like the plastic coating, and the nodes of Ranvier are like the copper bits peeking through for better conductivity!

Motor units strength & precision at play 🔥

  • What's a Motor Unit?

    • A motoneuron + the muscle fibers it controls.
  • Innervation Ratio

    • Muscle fibers per motoneuron.
    • More fibers = stronger force; fewer fibers = more precision.
  • All-or-Nothing Response

    • It's like a group dance! When a motoneuron sends the signal, all its muscle fibers groove together.

🤔 Real-world example: Think of a conductor (the motoneuron) and an orchestra (the muscle fibers). When the conductor signals, every musician (fiber) plays!

Types of motor units picking the right tool for the job 🌈

  • Type I (Slow Twitch)

    • Mainly slow twitch muscle fibers.
    • Slow but steady wins the race! They resist fatigue.
    • Ideal for: 🚶‍♂️Walking or 🏃‍♀️Jogging.
  • Type IIa (Fast Twitch Oxidative)

    • Mainly type IIa fibers.
    • Fast and strong yet still marathon runners, resisting fatigue.
    • Perfect for: 🏊‍♂️Swimming and 🚴‍♀️Cycling.
  • Type IIb

    • Fastest & strongest but tired easily.
    • Essential for: 🏃‍♂️Sprinting, 🏋️Weightlifting, and 🏅Jumping.

🤔 Real-world example: Think of them as cars! Type I is like a fuel-efficient car for long trips. Type IIa is a speedy car for long races. Type IIb is like a drag race car – super fast but only for short distances!

 

Wrap-up: Now, you're ready to impress your pals with your awesome knowledge on the nervous system and motor units! 🌟🎉

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IB Resources
Chapter 4 - Movement Analysis
Sports, Exercise & Health Science SL
Sports, Exercise & Health Science SL

Chapter 4 - Movement Analysis

Unlocking the Secrets of The Nervous System

Word Count Emoji
624 words
Reading Time Emoji
4 mins read
Updated at Emoji
Last edited on 14th Jun 2024

Neuron anatomy dive into details ✨

  • Soma (Cell Body)

    • Resides in spinal cord or close clusters named ganglia.
  • Dendrites

    • Connect neurons, sharing the latest gossip (information).
  • Axon

    • Nerve signal's superhighway.
    • Rocking a protective coat, the myelin (keeps signals safe & sound).
    • Myelin has rest stops called nodes of Ranvier for signal boost!
  • Neuromuscular Junction

    • Where neuron and muscle meet and greet.
    • Between them is the synapse, a tiny gap for passing the electrical 'hello' to the muscle.

🤔 Real-world example: Imagine the axon as an insulated electric wire. The myelin is like the plastic coating, and the nodes of Ranvier are like the copper bits peeking through for better conductivity!

Motor units strength & precision at play 🔥

  • What's a Motor Unit?

    • A motoneuron + the muscle fibers it controls.
  • Innervation Ratio

    • Muscle fibers per motoneuron.
    • More fibers = stronger force; fewer fibers = more precision.
  • All-or-Nothing Response

    • It's like a group dance! When a motoneuron sends the signal, all its muscle fibers groove together.

🤔 Real-world example: Think of a conductor (the motoneuron) and an orchestra (the muscle fibers). When the conductor signals, every musician (fiber) plays!

Types of motor units picking the right tool for the job 🌈

  • Type I (Slow Twitch)

    • Mainly slow twitch muscle fibers.
    • Slow but steady wins the race! They resist fatigue.
    • Ideal for: 🚶‍♂️Walking or 🏃‍♀️Jogging.
  • Type IIa (Fast Twitch Oxidative)

    • Mainly type IIa fibers.
    • Fast and strong yet still marathon runners, resisting fatigue.
    • Perfect for: 🏊‍♂️Swimming and 🚴‍♀️Cycling.
  • Type IIb

    • Fastest & strongest but tired easily.
    • Essential for: 🏃‍♂️Sprinting, 🏋️Weightlifting, and 🏅Jumping.

🤔 Real-world example: Think of them as cars! Type I is like a fuel-efficient car for long trips. Type IIa is a speedy car for long races. Type IIb is like a drag race car – super fast but only for short distances!

 

Wrap-up: Now, you're ready to impress your pals with your awesome knowledge on the nervous system and motor units! 🌟🎉

Table of content

Unlock the Full Content! File Is Locked Emoji

Dive deeper and gain exclusive access to premium files of Sports, Exercise & Health Science SL. Subscribe now and get closer to that 45 🌟