-
Throwing a baseball overhead
|
MUSCLE |
ACTION |
INNERVATION |
|
Flexor carpi radialis |
Flexes and abducts hand at wrist joint |
Median nerve |
|
Pectoralis major |
Flexes vertebral column, especially lumbar portion, and compresses abdomen to aid in defecation, urination, forced exhalation, and childbirth. |
Medial and lateral pectoral nerves |
-
Kicking a ball
|
MUSCLE |
ACTION |
INNERVATION |
|
Quadriceps femoris |
All four heads extend leg at knee joint; rectus femoris muscle acting alone also flexes thigh at hip joint. |
Femoral nerve |
|
Biceps femoris |
Flexes leg at knee joint and extends thigh at hip joint. |
Tibial and fibular nerves from sciatic nerve. |
-
Doing sit-ups
|
MUSCLE |
ACTION |
INNERVATION |
|
Rectus abdominis |
Flexes vertebral column, especially lumbar portion, and compresses abdomen to aid in defecation, urination, forced exhalation, and childbirth. |
Thoracic spinal nerves (T7-T12) |
|
Transversus abdominis |
Compresses the abdomen |
Thoracic spinal nerves (T8-T12), the iliohypogastric nerve, and ilioinguinal nerve. |
-
Breathing
|
MUSCLE |
ACTION |
INNERVATION |
|
Diaphragm |
Contraction elevates ribs and increases anteroposterior and lateral dimensions of thoracic cavity, resulting in inhalation; relaxation depresses ribs and decreases anteroposterior and lateral dimensions of thoracic cavity, resulting in exhalation. |
Phrenic nerve, which contains axons from cervical spinal nerves (C3–C5). |
|
External intercostals |
Contraction draws adjacent ribs together to further decrease anteroposterior and lateral dimensions of thoracic cavity during forced exhalation. |
Thoracic spinal nerves (T2-T12) |
Tortora, G. J., & Derrickson, B. (1975). Principles of Anatomy & Physiology. http://ndl.ethernet.edu.et/bitstream/123456789/1717/1/36%2c2012.pdf.pdf