Kinesiology 2241A/B Lecture Notes - Lecture 3: Flexor Digitorum Longus Muscle, Net Force, Peroneus Longus

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 2241A/B
• Professor: Thomas Richard Jenkyn

Document Summary

Upward rotation of scapula: 50-60 degrees, upward rotation is necessary in the scapula because if not, the humeral head would shear and compress the acromion during abduction, the humerus articulates with the glenoid fossa of the scapula. Hip extension and knee extension: lateral rotation of hip and knee flexion, hip flexion and knee extension, hip extension and knee flexion, external rotation of hip and knee extension. The joints that they cross are the hip and knee. The articulations that these movements occur are gastrocnemius, soleus, plantaris, flexor halluces longus, flexor digitorum longus, tibialis posterior, peroneus longus and the peroneus brevis. They are associated with plantar flexion as they allow the dorsum of the foot to lengthen in line with the leg. Pumping in a suspended swing is an external force acting on your center of gravity causing an upwards displacement of the body. This in turn causes acceleration producing a net force.