ACTIVITY 2

ARZADON, Beatrice V.

ARZADON, Beatrice V.

by Beatrice Arzadon -
Number of replies: 0
  1. Throwing a baseball overhead
    1. Subscapularis
      1. Action: It is for the arm internal rotation of the shoulder joint and stabilizes humeral head in glenoid cavity
      2. Innervation: Upper and lower subscapular nerves (C5 to C6)
    2. Latissimus dorsi
      1. Action: It pulls the inferior angle of the scapula in various directions, producing movements on the shoulder joint; internal rotation, adduction, and extension of the arm
      2. Innervation: Thoracodorsal nerve (C6 to C8)
  2. Kicking a ball
    1. Biceps femoris
      1. Action: It is for the flexion of the leg at the knee joint, extension of thigh at the hip, and medially rotates the thigh at the hip joint and the leg at the knee joint
      2. Innervation: Tibial part of the sciatic nerve
    2. Quadriceps femoris
      1. Action: It is to extend the leg at the knee join and to flex the thigh at the hip joint
      2. Innervation: Femoral nerve (L2 to L4)
  3. Doing sit ups
    1. Rectus abdominis
      1. Action: It is for the flexion of the trunk (flexion of thoracic and lumbar spine, while it works by drawing pubic symphysis and sternum toward each other)
      2. Innervation: Intercostal nerves (T7 to T11), Subcostal nerve (T12)
    2. Transversus abdominis
      1. Action: It is for the compression of abdominal contents
      2. Innervation: Thoracoabdominal nerves (T7 to T11), subcostal nerve (T12), and branches of the lumbar plexus
  4. Breathing
    1. Diaphragm
      1. Action: The diaphragm is the primary muscle of respiration. During inspiration, it contracts and flattens, increasing the vertical diameter of the thoracic cavity. This produces lung expansion, and air is drawn in. During expiration, the diaphragm passively relaxes and returns to its original dome shape. This reduces the volume of the thoracic cavity.
      2. Innervation: The halves of the diaphragm receive motor innervation from the phrenic nerve. The left half of the diaphragm (known as a hemidiaphragm) is innervated by the left phrenic nerve, and vice versa. Each phrenic nerve is formed in the neck within the cervical plexus and contains fibers from spinal roots C3-C5.
    2. Internal intercostal muscles
      1. Action: These depress ribs during forced expiration and support intercostal spaces and thoracic cage.
      2. Innervation: Intercostal nerves

 

References

Vaskovic, J. (2023). Subscapularis muscle. Kenhub. Retrieved from https://www.kenhub.com/en/library/anatomy/subscapularis-muscle

 

Smith, M. (2023).  Latissimus dorsi muscle. Kenhub. Retrieved from https://www.kenhub.com/en/library/anatomy/latissimus-dorsi-muscle

 

Shahid, S. (2023). Rectus abdominis muscle. Kenhub. Retrieved from https://www.kenhub.com/en/library/anatomy/rectus-abdominis-muscle

 

Mnatzakanian, A. (2023). Transversus Abdominis. TeachMe Anatomy. Retrieved from https://teachmeanatomy.info/encyclopaedia/t/transversus-abdominis/

 

Jones, O. (2022). Muscles in the Posterior Compartment of the Thigh. TeachMe Anatomy. Retrieved from https://teachmeanatomy.info/lower-limb/muscles/thigh/hamstrings/

 

Vaskovic, J. (2023). Quadriceps femoris muscle. Kenhub. Retrieved from https://www.kenhub.com/en/library/anatomy/the-quadriceps-femoris-muscle

 

Jones, O. (2023). The Diaphragm. TeachMe Anatomy. Retrieved from https://teachmeanatomy.info/thorax/muscles/diaphragm/


Vaskovic, J. (2023). Internal intercostal muscles. Kenhub. Retrieved from https://www.kenhub.com/en/library/anatomy/internal-intercostal-muscles