Eunice Dimaculangan 2024 - 01077
1. Throwing a baseball overhea
Deltoid
- Action: flexion and internal rotation of the arm, abduction of the arm, and extension and external rotation of the arm.
- Innervation: Axillary nerve
Pectoralis Major
- Action: arm adduction, arm internal rotation, arm flexion, arm extension, and draws scapula anteroinferiorly
- Innervation: Lateral and medial pectoral nerves
2. Kicking a ball
Biceps Femoris
- Action: thigh extension, thigh external rotation, leg flexion, leg external rotation, and stabilizes pelvis
- Innervation: tibial division of sciatic nerve and common fibular division of sciatic nerve
Gluteus Maximus
- Action: Thigh extension, thigh external rotation, thigh abduction, thigh adduction
- Innervation: Inferior gluteal nerve
3. Doing sit-ups
Rectus abdominis
- Action: Trunk flexion, compresses abdominal viscera, expiration
- Innervation: intercostal and subcostal nerves
External Oblique
- Action: Trunk flexion, compresses abdominal viscera, expiration, Trunk lateral flexion, trunk rotation
- Innervation: intercostal nerves, subcostal nerves, iliohypogastric nerve
4. Breathing
Diaphragm
- Action: Depresses costal cartilages, primary muscle of breathing/inspiration
- Innervation: Phrenic nerves
Intercostal muscles
- Action: Mechanical support to the thoracic cage, accessory respiratory muscles
- Innervation: intercostal nerves