1. Turning a door knob
Muscles: (a) Supination; (b) Pronator teres; (c) Pronator Quadrates muscles
Action: (a) Movement of forearm that turns palm anteriorly; (b) Pronates forearm at radioulnar joints and weakly flexes forearm at elbow joint; (c) Pronates forearm at radioulnar joints
Innervation: (a) Deep radial nerve; (b) Median nerve; (c) Median Nerve
2. Throwing a baseball overhead
Muscles: (a) Teres Major; (b) Subscapularis; (c) Deltoid;
Action: (a) Extends arm at shoulder joint and assist in adduction and medial rotation of arm at shoulder joint; (b) Medially rotates arm at shoulder joint; (c) flexion, internal rotation, abduction, extension, and external rotation of the arm
Innervation: (a) Lower subscapular nerve; (b) Upper and lower subscapular nerve; (c) Axillary nerve
3. Kicking a ball
Muscles: (a) Psoas major; (b) Gluteus medius; (c) Iliacus
Action: (a) Flex thigh at hip joint, rotate thigh laterally; (b) thigh abduction, thigh internal rotation, Pelvis stabilization; (c) thigh or trunk flexion
Innervation: (a) Lumbar spinal nerves; (b) Superior gluteal nerve; (c) Femoral nerve
4. Doing sit-ups
Muscles: (a) Rectus Abdominis; (b) Iliopsoas; (c) External Obliques
Action: (a) Flexes vertebral column; (b) Flexion and external rotation of the thigh at hip joint; (c) compress abdomen and flex vertebral column
Innervation: (a) Thoracic spinal nerves; (b) Lumbar spinal nerves; (c) Thoracic spinal nerves and iliohypogastric nerve
5. Walking
Muscles: (a) Rectus femoris; (b) Hamstrings; (c) Gluteus maximus
Action: (a) Extend leg at knee joint and thigh flexion; (b) flexes leg at knee joint and extends thigh at hip joint; (c)extends thigh at hip joint and laterally rotates thigh
Innervation: (a) Femoral nerve; (b) Tibial and fibular nerves from sciatic nerve; (c) Inferior gluteal nerve
6. Breathing
Muscles: (a) Diaphragm; (b) Intercostal muscle; ( c) External intercostals
Action: (a) Inhalation - contraction of diaphragm, flattens and increases vertical dimension of thoracic cavity and Exhalation - moves superiorly and decreases vertical dimension of thoracic cavity; (b) Inhalation - contraction elevates ribs and increases anteroposterior and lateral dimensions of thoracic cavity and Exhalation - relaxation depresses ribs and decreases anteroposterior and lateral dimensions of thoracic cavity; (c) contraction draws adjacent ribs together to further decrease anteroposterior and lateral dimensions of thoracic cavity during forced exhalation.
Innervation: (a) Phrenic nerve; (b) Thoracic spinal nerves; (c) Thoracic spinal nerves