Turning doorknob
Muscle: Supinator
Action: rotates the radius laterally at the proximal radioulnar joint
Innervation: Posterior interosseous nerve (C7, C8)
Muscle: Flexor carpi ulnaris
Action: acts in tandem with flexor carpi radialis to flex the wrist and with the extensor carpi ulnaris to adduct the wrist.
Innervation: Ulnar nerve (C7-T1)
Muscle: Flexor carpi radialis
Action: adduct and flex the wrist at the same time
Innervation: Median nerve (C6, C7)
Throwing a baseball overhead
Muscle: Teres major
Action: pulls the anterior surface of the humerus medially towards the trunk, can extend the arm from the flexed position.
Innervation: Lower subscapular nerve (C5-C7)
Muscle: Subscapularis
Action: rotates the head of the humerus medially and adducts it
Innervation: Upper and lower subscapular nerves (C5 - C6)
Muscle: Deltoid
Action: Arm abduction
Innervation: Axillary nerve
Kicking a ball
Muscle: Quadriceps femoris
Action: extends the knee
Innervation: Femoral nerve (L2-L4)
Muscle: Iliopsoas
Action: strongest hip flexor and assists in external rotation of the femur
Innervation: Branches from L1 to L3
Muscle: Rectus femoris
Action: extends the knee and assists iliopsoas in hip flexion
Innervation: Femoral nerve (L2-L4)
Doing sit-ups
Muscle: Rectus abdominis
Action: Trunk flexion, compresses abdominal viscera, expiration
Innervation: Intercostal nerves (T7-T11), subcostal nerve (T12)
Muscle: Transverse abdominis
Action: support lumbopelvic during our movement, maintains abdominal tension
Innervation: the lower intercostal nerves (thoracoabdominal, nerve roots T7-T11), iliohypogastric nerve and the ilioinguinal nerve
Muscle: Obliques
Action: helps rotate the trunk, stabilize core, helps pull the chest, assists in forced expiration in breathing
Innervation: intercostal nerves, lumbar plexus
Walking
Muscle: Soleus
Action: ankle plantarflexion when the knee is straight
Innervation: Tibial nerve
Muscle: Gastrocnemius
Action: plantar flexor of the foot at the talocrural joint
Innervation: Tibial nerve
Muscle: Tibialis anterior
Action: dorsiflexes the foot at the talocrural joint and inverts it at the subtalar joint.
Innervation: Deep fibular nerve (L4, L5)
Breathing
Muscle: Diaphragm
Action: Inhalation - contracts and flattens and the chest cavity enlarges; Exhalation: relaxes and returns to its domelike shape, and the air is forced out of the lungs.
Innervation: phrenic nerve
Muscle: External intercostal muscle
Action: elevate the ribs during forced inhalation
Innervation: Intercostal nerves
Muscle: Rectus abdominis
Action: increases the intra-abdominal pressure which is important during breathing
Innervation: thoracoabdominal nerves