Activity 2
1. Turning a door knob
a. Supinator
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Action- moves the arm and forearm anteriorly
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Innervation- posterior interosseous nerve
b. Flexor digitorum superficialis
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Action- bends finger to make a fist
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Innervation- median nerve
c. Pronator quadratus
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Action- assists in turning hand palm down
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Innervation- median nerve
2. Throwing a baseball overhead
a. Subscapularis
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Action- medially rotates the arm
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Innervation- upper and lower subscapular nerve
b. Latissimus dorsi
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Action- extension, adduction, and medial rotation of the arm
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Innervation- C6-C8 nerves through longs subscapular nerve
c. Infraspinatus
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Action- laterally rotates the arm
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Innervation- suprascapular nerve
3. Kicking a ball
a. Rectus femoris
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Action- leg extension
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Innervation- femoral nerve
b. Psoas major
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Action- flexion and lateral rotation of the thigh
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Innervation- anterior rami of lumbar spinal nerves
c. Iliacus
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Action- flexion and lateral rotation of the thigh
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Innervation- femoral nerve
4. Doing sit-ups
a. Rectus abdominis
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Action- flexion, sitting up
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Innervation- intercostal nerves and subcostal nerve
b. Internal obliques
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Action- supination and lateral flexion of the trunk
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Innervation- intercostal nerves and subcostal nerve, iliohypogastric nerve, ilioinguinal nerve
c. Transverse abdominis
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Action- compression off abdominal viscera, trunk rotation
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Innervation- intercostal nerves and subcostal nerve, iliohypogastric nerve, ilioinguinal nerve
5. Walking
a. Soleus
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Action- plantar flexion
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Innervation- tibial nerve
b. Gastrocnemius
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Action- plantar flexion and tibia flexion
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Innervation- tibial nerve
c. Rectus femoris
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Action- leg extension
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Innervation- femoral nerve
6. Breathing
a. External intercostal
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Action- expands the thoracic cavity
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Innervation- intercostal nerve
b. Internal intercostal
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Action- moves the ribs closer through the superior/ inferior axis
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Innervation- intercostal nerve
c. Serratus anterior
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Action- abducts and rotates scapula upward, elevates ribs
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Innervation- long thoracic nerve