ACTIVITY 2
Name at least two muscles that actively contracts during the following activities and name its action and innervation:
Throwing a baseball overhead
Action Innervation
- Biceps brachii Lifts ball C5 and C6
- Trapezius Controls scapula Cranial Nerve 11
Kicking a ball
Action Innervation
- Right vastus intermedius Extends the leg femoral nerve
- Semitendinosus Flexes knee tibial part of sciatic nerve
Doing sit-ups
Action Innervation
- Rectus abdominus Flexes trunk anteriorly Thoracoabdominal nerves
- Psoas Brings trunk closer to knees Anterior rami of L1-L4
Breathing
Action Innervation
- Diaphragm Helps inhale/expel air Phrenic nerve
- Intercostal muscles Moves chest wall Intercostal nerves