Voluntary muscles

• Label these voluntary muscles of the body

  :

  A) pectoralis major

  B) biceps

  C) quadriceps

  D) tibialis anterior

  E) deltoid

  F) abdominals

  G) hip flexors

  H) gastrocnemius

  I) N/A

  J) triceps

  K) latissimus dorsi

  L) gluteus maximus

  M) hamstrings

  
• When the tibialis anterior contracts it causes dorsi-flexion at the ankle
• When the latissimus dorsi contracts it causes adduction at the shoulder
• When the hip flexors contract it causes flexion at the hip
• When the hamstrings contract it causes flexion at the knee
• When the gastrocnemius contracts it causes plantar-flexion at the ankle
• When the quadriceps contract it causes extension at the knee
• When the gluteus maximus contracts it causes extension at the hip
• When the external obliques contract it causes abduction at the spine
• When the pectoralis major contracts it causes adduction/flexion at the shoulder
• When the deltoid contracts it causes abduction/flexion/extension at the shoulder
• When the biceps contracts it causes flexion at the elbow
• When the triceps contract it causes extension at the elbow