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Two joint muscles in the upper limb is the wrist and the elbow. Two joint muscles in the lower limb is the ankle and the knee.
For a limb to move, you need muscles, nerves, and a signal from the brain. The brain sends signals through nerves to the muscles, which contract and allow the limb to move.
The median nerve controls muscles in the forearm and hand, providing sensation to the palm and fingers. The iliohypogastric nerve supplies motor function to the lower abdominal muscles and sensory innervation to the skin over the lower abdomen and groin area.
The lower limb attaches at the hip region, where the femur (thigh bone) articulates with the pelvic bone to form the hip joint.
Plexuses primarily supply the limbs and certain body regions, with major examples being the brachial plexus for the upper limb, the lumbar plexus for the lower limb, and the sacral plexus also serving the lower limb and pelvic area. In contrast, intercostal nerves supply the thoracic wall, including the intercostal muscles, skin over the thorax, and parts of the abdominal wall. These nerves arise from the thoracic spinal nerves and do not form plexuses.
Two joint muscles in the upper limb is the wrist and the elbow. Two joint muscles in the lower limb is the ankle and the knee.
keen,limb.toes
adductor muscles
For a limb to move, you need muscles, nerves, and a signal from the brain. The brain sends signals through nerves to the muscles, which contract and allow the limb to move.
Medial aspect of the lower limb
The patellar ligament separates the kneecap from the lower limb. It connects the bottom of the kneecap to the tibia bone in the lower limb.
All the muscles of the upper limb
Muscles are in pairs as when one muscle contracts, its pair will relax, and the limb is moved. The reverse happens when the limb is returned to its starting position. Muscles can pull, but they can't push.
flexors
Lower limb bones are attached to the axial skeleton by the pelvic bones, specifically the sacrum which connects to the hip bones to form the pelvis. This connection is important for weight-bearing and locomotion.
The muscle is, Lattisimus dorsi, connected with upper limb at the bicipital groove and with lower limb at illiac crest.
The primary muscles acting on the hip and lower limb include the gluteal muscles (gluteus maximus, medius, and minimus), which are responsible for hip extension, abduction, and stabilization. The hip flexors, particularly the iliopsoas, are crucial for hip flexion. Additionally, the quadriceps and hamstrings play vital roles in knee extension and flexion, respectively, while the calf muscles (gastrocnemius and soleus) facilitate ankle movement. These muscle groups work in concert to enable various movements such as walking, running, and jumping.