Podcast
Questions and Answers
Which of the following is NOT a content of the inguinal canal?
Which of the following is NOT a content of the inguinal canal?
What is the shape of the deep inguinal ring?
What is the shape of the deep inguinal ring?
Where is the superficial inguinal ring located?
Where is the superficial inguinal ring located?
What is the function of the conjoint tendon?
What is the function of the conjoint tendon?
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Which nerve is present in the inguinal canal in both males and females?
Which nerve is present in the inguinal canal in both males and females?
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What is the direction of the inguinal canal?
What is the direction of the inguinal canal?
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What is the length of the inguinal canal?
What is the length of the inguinal canal?
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Which muscles provide the aponeurotic fibers for the conjoint tendon?
Which muscles provide the aponeurotic fibers for the conjoint tendon?
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What is the location of the superficial inguinal ring?
What is the location of the superficial inguinal ring?
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Which muscle is the largest and most superficial of the three muscles in the lateral and anterior parts of the abdomen?
Which muscle is the largest and most superficial of the three muscles in the lateral and anterior parts of the abdomen?
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Which muscle inserts onto the lower 3 ribs?
Which muscle inserts onto the lower 3 ribs?
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Which muscle is the most internal of the flat muscles of the abdomen?
Which muscle is the most internal of the flat muscles of the abdomen?
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Which muscle extends the whole length of the abdomen and is separated from its opposite side by the linea alba?
Which muscle extends the whole length of the abdomen and is separated from its opposite side by the linea alba?
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Which layer of the abdominal wall is composed of the aponeurosis of the three flat muscles (external and internal oblique, transversus abdominis) as they converge in the midline to form the median linea alba?
Which layer of the abdominal wall is composed of the aponeurosis of the three flat muscles (external and internal oblique, transversus abdominis) as they converge in the midline to form the median linea alba?
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Which layer of the abdominal wall sits between Camper’s fascia and the rectus sheath?
Which layer of the abdominal wall sits between Camper’s fascia and the rectus sheath?
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Which muscle fixes rib 12 during inspiration and performs extension and lateral flexion of the trunk?
Which muscle fixes rib 12 during inspiration and performs extension and lateral flexion of the trunk?
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Which muscle laterally rotates the thigh (ipsilateral), and laterally flexes the trunk (ipsilateral)?
Which muscle laterally rotates the thigh (ipsilateral), and laterally flexes the trunk (ipsilateral)?
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Which muscle is responsible for flexion of the thigh?
Which muscle is responsible for flexion of the thigh?
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Which muscle is the most internal of the posterior abdominal wall muscles and originates from the iliac crest and iliolumbar ligament?
Which muscle is the most internal of the posterior abdominal wall muscles and originates from the iliac crest and iliolumbar ligament?
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Quadratus Lumborom is inervated by the ventral rami of spinal nerves...
Quadratus Lumborom is inervated by the ventral rami of spinal nerves...
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Which nerve innervates the iliacus?
Which nerve innervates the iliacus?
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Which of the following is the origin of Psoas major?
Which of the following is the origin of Psoas major?
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Both Iliacus and Psoas major insert onto the greater trochanter of the femur
Both Iliacus and Psoas major insert onto the greater trochanter of the femur
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Quadratus Lumborum inserts onto
Quadratus Lumborum inserts onto
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List two muscles that originate from the liac crest
List two muscles that originate from the liac crest
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Internal oblique performs contralateral rotation
Internal oblique performs contralateral rotation
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Transervsus Abdominis, Internal Oblique and External Oblique all insert onto Linea alba
Transervsus Abdominis, Internal Oblique and External Oblique all insert onto Linea alba
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Which muscle inserts onto iliac crest? (Hint- this is the only abdominal muscle that inserts onto the iliac crest)
Which muscle inserts onto iliac crest? (Hint- this is the only abdominal muscle that inserts onto the iliac crest)
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Study Notes
Inguinal Canal
- Contents of the inguinal canal do not include structures such as the ilioinguinal nerve in males.
- The deep inguinal ring is oval-shaped, providing an entrance to the canal.
- The superficial inguinal ring is located above the pubic tubercle and is triangular in shape.
- The conjoint tendon functions to reinforce the posterior wall of the inguinal canal, aiding in preventing hernias.
- Both male and female inguinal canals contain the ilioinguinal nerve.
- The inguinal canal runs in an oblique direction from the deep to the superficial ring.
- The inguinal canal measures approximately 4 cm in length.
Abdominal Muscles
- The external abdominal oblique is the largest and most superficial muscle in the lateral and anterior parts of the abdomen.
- The internal oblique muscle inserts onto the lower three ribs.
- The transversus abdominis is the most internal flat muscle of the abdomen.
- The rectus abdominis extends the full length of the abdomen, separated by the linea alba from the opposite side.
- The aponeurotic layer of the abdominal wall comprises the aponeuroses of the external and internal oblique muscles, along with the transversus abdominis, converging to form the linea alba.
- The layer between Camper’s fascia and the rectus sheath is known as Scarpa's fascia.
- The quadratus lumborum muscle fixes rib 12 during inspiration and assists in trunk extension and lateral flexion.
- The iliopsoas muscle, consisting of iliacus and psoas major, flexes the thigh.
Muscles and Innervation
- The quadratus lumborum originates from the iliac crest and iliolumbar ligament, innervated by the ventral rami of spinal nerves T12-L4.
- The iliacus muscle receives innervation from the femoral nerve.
- The psoas major originates from the lumbar vertebrae (sides of bodies and intervertebral discs).
- Both the iliacus and psoas major muscles insert onto the greater trochanter of the femur.
- The quadratus lumborum also inserts onto the lower ribs and the transverse processes of lumbar vertebrae.
- Two muscles that originate from the iliac crest include the internal oblique and the transversus abdominis.
- The internal oblique muscle is involved in contralateral rotation of the trunk.
- The transversus abdominis, internal oblique, and external oblique all insert onto the linea alba.
- The iliacus muscle is unique as it is the only abdominal muscle that inserts onto the iliac crest.
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Description
Test your knowledge of the muscles and anatomy of the anterior and posterior abdominal wall, as well as the inguinal canal. This quiz covers topics such as muscle attachment, location, innervation, and main actions/roles. Get ready to flex your anatomy knowledge!
