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Questions and Answers
What is the primary action of the tensor fascia lata?
What is the primary action of the tensor fascia lata?
Which nerve supplies the tensor fascia lata?
Which nerve supplies the tensor fascia lata?
What is the anatomical boundary that defines the superior limit of the gluteal region?
What is the anatomical boundary that defines the superior limit of the gluteal region?
Where does the tensor fascia lata originate?
Where does the tensor fascia lata originate?
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What is the main role of the gluteal muscles during walking?
What is the main role of the gluteal muscles during walking?
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Which two ligaments are associated with the gluteal region?
Which two ligaments are associated with the gluteal region?
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What is the significance of the greater and lesser sciatic foramina?
What is the significance of the greater and lesser sciatic foramina?
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Which muscle is primarily responsible for lateral rotation of the hip?
Which muscle is primarily responsible for lateral rotation of the hip?
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What defines the inferior boundary of the gluteal region?
What defines the inferior boundary of the gluteal region?
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Which structure passes through the greater sciatic foramen?
Which structure passes through the greater sciatic foramen?
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What is the primary action performed by the gluteus maximus muscle during movement?
What is the primary action performed by the gluteus maximus muscle during movement?
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Which nerve supplies the gluteus maximus muscle?
Which nerve supplies the gluteus maximus muscle?
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Where does the gluteus maximus muscle primarily insert?
Where does the gluteus maximus muscle primarily insert?
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What specific region of the gluteus maximus is recommended for intramuscular injections?
What specific region of the gluteus maximus is recommended for intramuscular injections?
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Which of the following structures is NOT located deep to the gluteus maximus?
Which of the following structures is NOT located deep to the gluteus maximus?
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What is a potential consequence of improperly administered intramuscular injections in the gluteal region?
What is a potential consequence of improperly administered intramuscular injections in the gluteal region?
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What role does the gluteus maximus play in the stabilization of the knee while standing?
What role does the gluteus maximus play in the stabilization of the knee while standing?
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Which of the following muscles is NOT attached to the greater trochanter?
Which of the following muscles is NOT attached to the greater trochanter?
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Which of the following actions is performed by the gluteus maximus during the process of rising from a sitting position?
Which of the following actions is performed by the gluteus maximus during the process of rising from a sitting position?
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What anatomical features are specifically mentioned to be deep to the gluteus maximus?
What anatomical features are specifically mentioned to be deep to the gluteus maximus?
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What is the primary action of the obturator internus muscle?
What is the primary action of the obturator internus muscle?
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Which nerve supplies the superior gemellus muscle?
Which nerve supplies the superior gemellus muscle?
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From which landmark does the inferior gemellus muscle originate?
From which landmark does the inferior gemellus muscle originate?
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What is the insertion point of the quadratus femoris muscle?
What is the insertion point of the quadratus femoris muscle?
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What is the nerve supply for the obturator externus muscle?
What is the nerve supply for the obturator externus muscle?
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Where does the tendon of the obturator internus pass through before inserting?
Where does the tendon of the obturator internus pass through before inserting?
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Which muscle shares the same action as the quadratus femoris?
Which muscle shares the same action as the quadratus femoris?
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Which of the following muscles originates from the pelvic surface of the obturator membrane?
Which of the following muscles originates from the pelvic surface of the obturator membrane?
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What action does the superior gemellus muscle primarily assist with?
What action does the superior gemellus muscle primarily assist with?
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Which structure does the obturator externus tendon insert into?
Which structure does the obturator externus tendon insert into?
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Which muscle originates from the outer surface of the ilium between the posterior gluteal line and anterior gluteal line?
Which muscle originates from the outer surface of the ilium between the posterior gluteal line and anterior gluteal line?
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What action do both the gluteus medius and minimus perform?
What action do both the gluteus medius and minimus perform?
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What is the primary nerve supply to the gluteus medius and minimus?
What is the primary nerve supply to the gluteus medius and minimus?
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Which muscle is located deep to the gluteus medius?
Which muscle is located deep to the gluteus medius?
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What condition is indicated when there is paralysis of both gluteus medius and minimus muscles on one side?
What condition is indicated when there is paralysis of both gluteus medius and minimus muscles on one side?
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Which muscle prevents sagging of the pelvis when the opposite leg is off the ground?
Which muscle prevents sagging of the pelvis when the opposite leg is off the ground?
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The piriformis muscle originates from which part of the body?
The piriformis muscle originates from which part of the body?
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What muscle is responsible for powerful extension of the thigh when standing up from a sitting position?
What muscle is responsible for powerful extension of the thigh when standing up from a sitting position?
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Which structure passes through the sciatic foramina?
Which structure passes through the sciatic foramina?
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Which of the following muscles is primarily responsible for medial rotation of the thigh?
Which of the following muscles is primarily responsible for medial rotation of the thigh?
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Study Notes
Gluteal Region - Key Structures and Functions
- Boundaries: Bounded superiorly by the iliac crest, inferiorly by the gluteal fold, posteromedially by the natal cleft, and anterolaterally by a line from the anterior superior iliac spine to the greater trochanter.
Muscles of the Gluteal Region
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Tensor Fascia Lata (TFL):
- Origin: Outer lip of the iliac crest between the anterior superior iliac spine and the iliac tubercle.
- Insertion: Anterior border of the iliotibial tract.
- Nerve Supply: Superior gluteal nerve.
- Action: Tightens the iliotibial tract, assisting in keeping the knee extended during standing and walking.
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Gluteus Maximus:
- Largest muscle in the body.
- Origin: Outer gluteal surface of the ilium, posterior gluteal line, posterior surface of the sacrum and coccyx, and the back of the sacro-tuberous ligament.
- Insertion: Fibers pass downwards and laterally; superficial 3/4 inserts into the posterior border of the upper part of the iliotibial tract; deep 1/4 inserts into the floor of the gluteal tuberosity.
- Nerve Supply: Inferior gluteal nerve.
- Action: Main extensor of the hip joint, lateral rotator and abductor of the hip joint, tightens the iliotibial tract for knee extension during standing. Ideal intramuscular injection site (avoiding the sciatic nerve).
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Gluteus Medius:
- Origin: Outer surface of the ilium (between iliac crest, posterior, and anterior gluteal lines).
- Insertion: Oblique ridge on the lateral surface of the greater trochanter.
- Nerve Supply: Superior gluteal nerve.
- Action: Abduction of the hip joint, medial rotation of the thigh (anterior fibers), preventing pelvic sagging during unilateral leg stance.
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Gluteus Minimus:
- Origin: Outer surface of the ilium (between anterior and inferior gluteal lines).
- Insertion: Anterior surface of the greater trochanter.
- Nerve Supply: Superior gluteal nerve.
- Action: Abduction of the hip joint, medial rotation of the thigh (anterior fibers), preventing pelvic sagging during unilateral leg stance.
-
Other Lateral Rotators (Piriformis, Obturator Internus, Superior Gemellus, Inferior Gemellus, Quadratus Femoris, Obturator Externus):
- These muscles are all lateral rotators of the thigh at the hip joint.
- Have various origins and insertions, passing through the sciatic foramina.
- Each has a specific nerve supply from the sacral plexus (primarily).
Sciatic Nerve
- Important nerve in gluteal region, branches from the sacral plexus, has a complex surface anatomy and possible injury sites.
- Describe the site, termination, relations, branches, and surface anatomy of the sciatic nerve.
Foramina
- Define and describe the greater and lesser sciatic foramina—their boundaries and structures passing through them.
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Description
Test your knowledge on the key structures and functions of the gluteal region, including boundaries and muscle details. Explore the roles of muscles like the Tensor Fascia Lata and Gluteus Maximus in human anatomy. This quiz is perfect for anatomy students and enthusiasts alike!
