Question

muscles causing movement at the hip joint (figure 6.20)
gluteus maximus
the gluteus maximus (gloote - us maxi - mus) is a superficial muscle of the hip that forms most of the flesh of the buttock (figure 6.20a). it is a powerful hip (1. ) that acts to bring the thigh in a straight line with the pelvis. although it is not very important in walking, it is probably the most important muscle for extending the hip when power is needed, as when climbing stairs or jumping. it originates from the (2. ) and iliac bones and inserts on the gluteal tuberosity of the femur and into the large tendinous iliotibial tract.
gluteus medius
the gluteus medius runs from the ilium to the femur, beneath the gluteus maximus for most of its length. the gluteus medius is a hip abductor and is important in steadying the pelvis during walking. it is also an important site for giving (3. ) injections, particularly when administering more than 5 ml (figure 6.20b). although it might appear that the large, fleshy gluteus maximus that forms the bulk of the buttock mass would be a better choice, notice that the medial part of each buttock overlies the large sciatic nerve; hence this area must be carefully avoided to prevent (4. ) damage. this can be accomplished by imagining the buttock is divided into four equal quadrants (shown by the division lines on figure 6.20b). the superolateral quadrant then overlies the gluteus medius muscle, which is usually a very safe site for an intramuscular injection. injections at or near the sciatic nerve can result in physical trauma from the needle or (5. ) of the nerve itself.

1. extensor 2. sacrum 3. intramuscular 4. nerve 5. degeneration

1. degeneration 2. extensor 3. sacrum 4. intramuscular 5. nerve

1. nerve 2. degeneration 3. extensor 4. sacrum 5. intramuscular

1. sacrum 2. intramuscular 3. nerve 4. degeneration 5. extensor

1. intramuscular 2. nerve 3. degeneration 4. extensor 5. sacrum

Explanation:

The gluteus maximus is a hip extensor. It originates from the sacrum and iliac bones. The gluteus medius is a common site for intramuscular injections. The sciatic - nerve in the buttock area must be avoided to prevent nerve damage. Injections near the sciatic nerve can cause nerve degeneration.

Answer:

1. extensor 2. sacrum 3. intramuscular 4. nerve 5. degeneration