Muscle physiology course

Muscle physiology

• What is a muscle?

• How do muscular contractions occur?

​Learning objectives

What do you know?

Multiple Choice

Which muscle does the black arrow point too?

• triceps brachii
• deltoid
• pectoralis major
• Serratus anterior

Multiple Choice

Name the muscle included in the picture

• Vastus lateralis

• Tibialis Anterior

• Vastus medialis

• Tibialis medialis

Multiple Choice

Which of the below covers the fascicles?

• Epimysium
• Perimysium
• Endomysium
• Fascia

Match

Match the numbers with their correct name (Excluding #6)

• 1

• 2

• 3

• 4

• 5

Tendon

Muscle

Perimysium

Muscle fibre

Fascicle

• Tendon

• Muscle

• Perimysium

• Muscle fibre

• Fascicle

Multiple Choice

How many muscles are there approximately in the human body?

• Approximately 600
• Approximately 300
• Approximately 800
• Approximately 1000

Multiple Choice

What chemical is released from the sarcoplasmic reticulum?

• Calcium ions (Ca2+)
• Sodium ions (Na+)
• Potassium ions (K+)
• Chloride ions (Cl-)

Muscle physiology is the study of the mechanisms behind a muscle contraction

3 types

• Cardiac (heart, involuntary)

• Smooth (stomach, involuntary)

• Skeletal (muscles, voluntary)

This lecture will focus on skeletal

Before discussing HOW a contraction occurs, lets look at WHAT is it!

Muscle physiology - Why?

• Muscle has many 'layers'

• Largest = muscle

• Smallest = myofibril

• The muscle contraction occurs in the smallest layer of the muscle
  

Muscle physiology - Layers

• ​Each 'layer' is wrapped by connective tissue -'Mysium'

• What wraps each layer?

  • muscle

  • fascicle

  • muscle fiber

Muscle physiology - Fascia

​Click for more information
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• What is the smallest layer?

• What does it look like?

• What about the largest layer?

​

​Lets get a practical example

• Foam rolling = Myofascial release

• What do you think Myofascial release does?

​

Myofascial release

• ​Contractile elements i.e. sarcomere

• Series elastic components i.e. tendon

• Parallel elastic components i.e. wrappings

​​3 contributors to produce force

Categorize

Options (9)

Muscle

Fascicle

Myofirbil

Perimysium

Endomysium

Epimysium

Epimysium

Perimysium

Endomysium

Organize these options into the right categories

Muscle wrapping

Muscle layers