Anatomy of the Iliac Region

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Questions and Answers

What is referred to by the term 'iliac crest'?

A part of the hip bone (correct)

A nerve

A muscle

A spinal structure

What is the 'anterior superior iliac spine'?

A bony prominence on the pelvis

What does 'anterior inferior iliac spine' refer to?

A bony landmark on the ilium

Identify the 'posterior superior iliac spine'.

A bony prominence on the posterior side of the ilium Signup and view all the answers

What is the 'posterior inferior iliac spine'?

A landmark on the posterior side of the ilium Signup and view all the answers

What does 'greater sciatic notch' refer to?

A notch in the ilium that allows passage of nerves and blood vessels Signup and view all the answers

Define 'acetabulum'.

The socket of the hip bone that receives the head of the femur Signup and view all the answers

What is the function of the 'ischial spine'?

It serves as a muscle attachment point and a landmark in pelvic anatomy Signup and view all the answers

What does 'obturator foramen' signify?

An opening in the pelvis that allows passage of nerves and vessels Signup and view all the answers

Identify the 'ischial ramus'.

A branch of the ischium that helps form the obturator foramen Signup and view all the answers

What is the 'ischial tuberosity'?

The rounded part of the ischium where muscles attach Signup and view all the answers

Define 'lesser sciatic notch'.

A notch in the pelvis located below the greater sciatic notch Signup and view all the answers

What is the significance of the 'pubic tubercle'?

A prominent part of the pubis that serves as a muscle attachment point Signup and view all the answers

What does 'inferior ramus of pubis' refer to?

A part of the pubis that connects to the ischium Signup and view all the answers

Identify the 'body of pubis'.

The central part of the pubis bone Signup and view all the answers

Define 'ala'.

A wing-like structure of the ilium Signup and view all the answers

What is the 'ischial body'?

The main portion of the ischium that contributes to the pelvis Signup and view all the answers

Study Notes

Iliac Crest

The superior border of the ilium, plays a key role in connecting muscles and ligaments.
Provides an attachment site for abdominal muscles and the latissimus dorsi.

Anterior Superior Iliac Spine (ASIS)

A prominent bony landmark located at the front of the iliac crest.
Important for muscle attachment, specifically the sartorius and tensor fasciae latae muscles.

Anterior Inferior Iliac Spine (AIIS)

Located below the ASIS, serves as an attachment point for the rectus femoris muscle.
Plays a role in stabilizing the pelvis during movement.

Posterior Superior Iliac Spine (PSIS)

Found at the posterior end of the iliac crest, important for identification in anatomical landmarks.
Involved in the alignment of the pelvis.

Posterior Inferior Iliac Spine (PIIS)

Located below the PSIS, less prominent than its anterior counterpart.
Functions as an attachment point for various pelvic muscles.

Greater Sciatic Notch

A large indentation located posteriorly on the ilium, allows passage for the sciatic nerve.
Crucial for the transition of structures between the pelvis and lower limb.

Acetabulum

The cup-shaped socket of the hip joint formed by the fusion of the ilium, ischium, and pubis.
Articulates with the head of the femur to form the hip joint.

Ischial Spine

A pointed projection found on the ischium.
Acts as an attachment point for the sacrospinous ligament and muscles.

Obturator Foramen

A large opening formed by the ischium and pubis, mostly covered by the obturator membrane.
Transmits the obturator nerve and vessels to the thigh.

Ischial Ramus

The part of the ischium that extends towards the pubis.
Contributes to the formation of the obturator foramen and supports pelvic structures.

Ischial Tuberosity

A roughened, bony prominence on the ischium, serves as the sit bone.
Provides support for weight-bearing when sitting and an attachment point for muscles.

Lesser Sciatic Notch

A smaller indentation located inferior to the greater sciatic notch.
Serves as a passageway for structures entering and leaving the pelvis.

Pubic Tubercle

A prominence found on the superior part of the pubis.
Important landmark for the attachment of ligaments, particularly the inguinal ligament.

Inferior Ramus of Pubis

The segment of the pubis that extends downward and backward to join the ischium.
Plays a crucial role in forming the pelvic ring.

Body of Pubis

The central portion of the pubis, connecting the two pubic bones at the pubic symphysis.
Involved in weight transfer and the stability of the pelvis.

Ala

The wing-like part of the ilium, that broadens and flares laterally.
Provides area for muscle attachment and helps create space for the pelvic cavity.

Ischial Body

The main portion of the ischium, contributing to the structure and stability of the pelvis.
Supports the body’s weight when in a sitting position and aids in locomotion.

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Description

This quiz explores key anatomical landmarks of the iliac region, including the iliac crest and various spines. Learn about the functions and muscle attachments associated with each landmark. Perfect for students studying human anatomy.