biodex SIT2STAND 950-560, Руководство по эксплуатации и обслуживанию

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1. Trunk
The trunk muscles move the vertebral column and form the thoracic and abdominal
walls. The anterior portion of the trunk contains the abdominal muscles. The abdominal
muscles are responsible for flexing the trunk. The posterior portion of the trunk
contains the erector spinae muscles. These muscles run longitudinally on each side of
the vertebral column and are the prime movers responsible for extending the vertebral
column to maintain erect posture. The trunk muscles work together to contribute to
spine stability in a variety of postures.
2.
Glutes
The gluteal musculature is comprised of the gluteus maximus, gluteus medius and
gluteus minimus. The prime movement for the gluteus maximus is extension of the
thigh at the hip. The maximus also works to control downward movement of the hips
when you lower yourself to the chair. The medius and minimus help to steady the pelvis
during weight bearing activities.
3.
Quadriceps
The quadriceps muscles are on the anterior aspect of the thigh and are used in both
sitting and standing. They act in an eccentric contraction to resist gravity when you
lower yourself into a chair. The quadriceps also concentrically contract to extend your
leg at the knee, which allows you to stand. The action of the quadriceps is to flex the
hip and extend the knee.
4.
Hamstrings
The hamstring muscle group is comprised of 3 separate muscles; the bicep femoris, the
semintendinosus, and the semimembranosus. They originate from the ischial tuberosity
of the pelvic bone and insert on the medial and lateral surfaces of the tibia. Hamstrings
are primarily knee flexors and secondarily hip extensors.
5.
Gastro/Soleus
The gastrocnemius function is to flex the knee and plantarflex the foot with the assist of
the plantaris muscle. The soleus muscles plantarflex and invert the foot. Any movement
with body weight on the foot will recruit the soleus in to assist as a stabilizer when
rising to a stand position or lowering to a sit position.
6.
Tibialis Anterior
The tibialis anterior is located lateral to the shin bone on the front of the lower leg. This
muscle is responsible for dorsiflexing the foot but also works in an eccentric action to
prevent hyper-flexion of the ankle when you lower into a sitting position. It also helps to
stabilize the lower leg when standing.