Turning a doorknob
- MUSCLE: Supinator
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ACTION: Supinates the forearm and allows lateral movements of the radius at the radioulnar joints
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INNERVATION: Deep radial nerve
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MUSCLE: Pronator teres
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ACTION: Pronates the forearm at the radioulnar joints
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INNERVATION: Median nerves
- MUSCLE: Pronator quadratus
- ACTION: Pronates the forearm at the radioulnar joints
- INNERVATION: Median nerves
Throwing a baseball overhead
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MUSCLE: Deltoid
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ACTION: Abducts arm at the shoulder joint
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INNERVATION: Axillary nerve
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MUSCLE: Latissmus dorsi
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ACTION: Extends, abducts, and rotates the arm medially at the shoulder joint
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INNERVATION: Thoracodorsal nerve
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MUSCLE: Teres major
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ACTION: Extends and assists in abduction and medial rotation of the arm at shoulder joint.
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INNERVATION: Lower subscapular nerve
Kicking a ball
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MUSCLE: Gluteus maximus
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ACTION: extends thigh at hip joint and laterally rotates the thigh
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INNERVATION: Inferior gluteal nerve
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MUSCLE: Adductor longus
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ACTION: adducts and flexes the thigh at hip joint
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INNERVATION: Obturator nerve
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MUSCLE: Biceps femoris
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ACTION: flexes leg at knee joint and extends the thigh at the hip joint
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INNERVATION: Tibial and fibular nerves from the sciatic nerve
Doing sit-ups
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MUSCLE: Rectus abdominis
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ACTION: flexes the vertebral column and compresses the abdomen
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INNERVATION: Thoracic spinal nerves T7-T12
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MUSCLE: Transversus abdominis
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ACTION: compresses the abdominal muscles
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INNERVATION: Thoracic spinal nerves T8-T12, iliohypogastric nerve, and ilioinguinal nerve
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MUSCLE: External oblique
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ACTION: compresses the abdomen bilaterally and flexes the vertebral column (bilaterally or unilaterally)
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INNERVATION: Thoracic spinal nerves T7-T12 and the iliohypogastric nerve
Walking
- MUSCLE: Gluteus maximus
- ACTION: extends thigh at hip joint and laterally rotates the thigh
- INNERVATION: Inferior gluteal nerve
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MUSCLE: Gastrocnemius
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ACTION: plantar flexes foot at the ankle joint and flexes the leg at knee joint
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INNERVATION: Tibial nerve
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MUSCLE: Tibialis anterior
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ACTION: dorsiflexes foot at ankle joint and supinates the foot at the intertarsal joints
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INNERVATION: Peroneal nerve
Breathing
- MUSCLE: Diaphragm
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ACTION: contracts to facilitate inhalation and relaxes/expands to facilitate exhalation
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INNERVATION: Phrenic nerve containing axons and cervical spinal nerves C3-C5
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MUSCLE: Internal intercostals
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ACTION: draws adjacent ribs together during contraction (exhalation)
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INNERVATION: Thoracic spinal nerves T2-T12
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MUSCLE: External intercostals
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ACTION: elevates the ribs as it expands due to inhalation
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INNERVATION: Thoracic spinal nerves T2-T12