Activity 2
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Throwing a baseball overhead
Muscle: Triceps Brachii
Action - Extends the elbow
Innervation - Innervated by radial nerve
Muscle: Biceps Brachii
Action - Flexes the elbow
Innervation - C5 and C6 fibers of the musculocutaneous nerve -
Kicking a ball
Muscle: Hamstrings (biceps femoris, semimembranosus, semitendinosus)
Action - Flexes the knee
Innervation - Lumbar and Sacral Plexus Nerves
Muscle: Quadriceps Femoris
Action - Flexes hip, Extends knee
Innervation - L2 L3 L4 femoral nerve -
Doing sit-ups
Muscle: Rectus Abdominis
Action - Flexion of trunk
Innervation - Thoracoabdominal nerves
Muscle: External Obliques
Action - Flexion and contralateral rotation of trunk
Innervation - Thoracoabdominal nerves, Subcostal nerve
4. Breathing
Muscle: Diaphragm
Action - Contracts and flattens during inhalation, expands during exhalation
Innervation - Phrenic nerve
Muscle: Intercostal muscles
Action - Expands and shrinks the size of the chest cavity
Innervation - Intercostal nerves