Muscle Analysis Chart - Kine 3200 Synchronous Assignment 7

Muscle Analysis Chartnamekine 3200synchronous Assignment 7fill In Th

Fill in the chart by listing the muscles primarily involved in each movement of the wrist and fingers, including flexion, extension, adduction, and abduction at various joints. Additionally, answer questions about muscle involvement during computer keyboard use, the function of intrinsic hand muscles in turning a doorknob, and appropriate exercises for a patient with carpal tunnel syndrome.

Paper For Above instruction

The complex movements of the wrist and hand involve various muscles that coordinate to produce flexion, extension, adduction, and abduction at specific joints. Understanding which muscles are primarily responsible for these movements is essential for both clinical assessment and designing rehabilitation protocols. Similarly, knowledge of muscle involvement during everyday activities, such as typing or turning a doorknob, informs ergonomic recommendations and therapeutic interventions. For individuals with conditions like carpal tunnel syndrome, targeted exercises can alleviate symptoms and improve hand function when performed correctly.

Muscle Involvement in Wrist and Hand Movements

The wrist and fingers exhibit a range of movements primarily facilitated by specific muscle groups. At the wrist joint, flexion is mainly powered by the flexor carpi radialis, flexor carpi ulnaris, and palmaris longus muscles, while extension involves the extensor carpi radialis longus and brevis, and extensor carpi ulnaris. For wrist adduction (ulnar deviation), the flexor and extensor carpi ulnaris are primarily involved, whereas wrist abduction (radial deviation) uses the flexor carpi radialis and extensor carpi radialis muscles.

At the fingers' metacarpophalangeal (MCP) joints, flexion is primarily caused by the flexor digitorum superficialis and profundus, and extension by the extensor digitorum. The abduction and adduction of the fingers at the MCP joints involve the dorsal interossei and palmar interossei muscles, respectively. The proximal interphalangeal (PIP) joints' movements are mainly facilitated by the flexor digitorum superficialis and profundus for flexion, and the lateral bands of the extensor expansion for extension. The distal interphalangeal (DIP) joints are primarily acted upon by the flexor digitorum profundus for flexion, with the extensor digitorum assisting in extension.

Muscles Involved During Keyboard Use and Reaching for the Left Tab

When typing on a computer keyboard, the muscles involved include the flexor digitorum superficialis and profundus to flex the fingers, the extensor digitorum for finger extension, and the intrinsic hand muscles, such as the interossei and lumbricals, to fine-tune finger movements. Reaching for the left tab key involves wrist extensor muscles, primarily the extensor carpi radialis longus and brevis, which stabilize the wrist while the intrinsic and extrinsic hand muscles (like the flexor digitorum and lumbricals) coordinate finger movements. Maintaining proper ergonomic wrist stabilization minimizes strain and enhances precision during these activities.

Role of Intrinsic Hand Muscles in Turning a Doorknob

The intrinsic muscles of the hand, including the thenar and hypothenar muscles, dorsal and palmar interossei, and lumbricals, are critical during hand tasks like turning a doorknob. These muscles provide fine control, strength, and stability within the hand. During the act of turning a doorknob, the lumbricals and interossei muscles facilitate finger flexion at the MCP joints while extending the interphalangeal joints, gripping the knob securely. The thenar and hypothenar muscles stabilize the thumb and pinky, respectively, facilitating a firm grip and efficient rotation of the knob. Without the intrinsic muscles, precise finger coordination and grip strength would be compromised, affecting hand dexterity.

Exercises for Patients with Carpal Tunnel Syndrome

Patients with carpal tunnel syndrome experience nerve compression of the median nerve within the carpal tunnel, leading to symptoms such as numbness, tingling, and weakness in the hand and fingers. Exercises aimed at relieving pressure and promoting nerve gliding are highly beneficial. These include nerve gliding exercises, wrist stretches, and strengthening movements targeting the forearm and hand muscles.

One recommended exercise is the median nerve neural gliding maneuver. The patient extends the elbow, supinates the forearm, extends the wrist, and slowly bends and extends the fingers while gently moving the neck to stretch the nerve pathways. This exercise should be performed gently, holding each position for 5-10 seconds, and repeated 10-15 times daily. Wrist stretches, such as wrist flexion and extension stretches, help loosen the muscles and tendons around the carpal tunnel. Strengthening exercises, such as squeezing a soft ball, help support the wrist and hand structures, reducing strain during daily activities.

Manual therapy techniques, ergonomic modifications, and activity modifications complement these exercises by reducing repetitive strain on the wrists. Proper hand positioning during activities like typing, accompanied by regular breaks and stretches, can significantly improve symptoms and functional ability in patients with carpal tunnel syndrome.

Conclusion

In summary, the muscles involved in wrist and finger movements are specialized and coordinated to facilitate complex tasks, from typing and gripping to turning objects. Understanding these muscles enhances comprehension of hand function and supports effective rehabilitation strategies. Intrinsic hand muscles play a pivotal role in fine motor control and strength, essential for daily activities. For individuals with carpal tunnel syndrome, appropriate exercises and ergonomic adaptations are vital for symptom relief and functional improvement. A thorough knowledge of muscle anatomy, function, and therapeutic options empowers clinicians and patients alike in managing hand health optimally.

References

  • Beck, R., & Levin, R. (2018). Hand and wrist anatomy and biomechanics. Journal of Hand Therapy, 31(3), 253-262.
  • Conway, P. M., & Anderson, J. (2019). Rehabilitative exercises for carpal tunnel syndrome. Physical Therapy Reviews, 24(2), 123-130.
  • Fowler, S., & Smith, T. (2020). Ergonomics and preventive strategies for repetitive strain injuries. Occupational Health Journal, 35(4), 245-252.
  • Levin, M., & Chen, J. (2017). Intrinsic hand muscles and their function in hand dexterity. Journal of Anatomy, 231(2), 246-259.
  • Mathiowitz, S., & Casimir, P. (2021). Neural gliding exercises for median nerve entrapment. Hand Therapy, 26(1), 45-55.
  • Nguyen, T. T., & Lee, K. (2016). Anatomy and biomechanics of wrist movements. Orthopedic Clinics of North America, 47(3), 345-360.
  • Russo, C., & Austin, P. (2019). The role of intrinsic hand muscles in fine motor tasks. Journal of Motor Behavior, 51(2), 147-157.
  • Williams, D. B., & Robinson, J. (2022). Treatment and management of carpal tunnel syndrome. Journal of Practical Orthopedics and Sports Medicine, 9(3), 112-120.
  • Yamada, K., & Fletcher, J. (2015). Ergonomic considerations in computer workstations. Applied Ergonomics, 49, 187-193.
  • Zhao, L., & Chen, W. (2019). Preventive measures and exercises for nerve compression syndromes. Physical Therapy Science, 31(4), 414-420.

Related Assignments