Ch. 9 The Hip Joint and Pelvic Girdle - Pt. 1

Name the 3 Pelvic bones

1. ilium 2. ischium 3. pubis

Bones: Insertion for all 4 quadriceps muscles

Patella

Pelvic Bone: - Upper two fifths

ilium

T or F? The structural instability of the acetabular femoral (i.e. Hip) joint makes this joint highly susceptible to subluxations and dislocations

False

T or F? Pelvic rotation does not increase the length of stride in running

False (it does increase the length of stride in running)

Which of the following is not an action of the pectineus muscle?

Abduction of the hip

What is the most mobile joint of the body?

Acetabulofemoral joint

Agonist muscles during hip flexion include all of the following except:

Adductor Magnus (include: Rectus femoris, Psoas Major, Pectineus)

Movements: -accomplished by hip flexion/lumbar extension

Anterior pelvic rotation

Movements: Anterior movement of upper pelvis; iliac crest tilts forward in a sagittal plane; anterior tilt; downward rotation

Anterior pelvic rotation

T or F? The ischiofemoral ligament is responsible to limit external rotation of the hip

False

Bones: Ball and socket joint

Head of femur connecting with acetabulum of pelvic girdle

Movements: Movement of femur laterally to side away from midline

Hip abduction

Movements: Movement of femur medially toward midline

Hip adduction

Movements: Movement of femur in a diagonal plane away from midline of body

Hip diagonal abduction

Movements: Movement of femur in a diagonal plane toward midline of body

Hip diagonal adduction

Movements: Movement of the femur straight posteriorly away from the pelvis

Hip extension

Movements: Rotary movement of femur laterall around its longitudinal axis away from midline

Hip external rotation

Movements: Movement of femur straight anteriorly toward pelvis

Hip flexion

Movements: movements of femur in a horizontal or transverse plane away from pelvis

Hip horizontal abduction

Movements: Movement of femur in a horizontal or transverse plane toward pelvis

Hip horizontal adduction

Movements: Rotary movements of femure mediall around its longitudinal axis toward midline

Hip internal rotation

Bones: Origin for hip abductors

Lateral Pelvis

Movements: accomplished by hip abduction, hip adduction, and or lumbar lateral flexion

Lateral pelvic rotation

Movements: In frontal plane left pelvis moves inferiorly in relation to right pelvis

Left lateral pelvic rotation

Movements: In horizontal plane pelvis rotates to body's left

Left transverse pelvic rotation

Bones: Origin for hip adductors

Medially

Movements: accomplished by hip extension /lumbar flexion

Posterior Pelvic Rotation

Movements: Posterior movement of upper pelvis; iliac crest tilts backward in a sagittal plane; posterior tilt; upward rotation

Posterior pelvic rotation

Bones: Origin for hip extensors

Posteriorly/Posteroinferiorly

Bones: Insertion for short muscles of hip

Proximal thigh

Joints: Anteriorly: - Two pelvic bones join to form ?

Pubic symphysis

Which of the following is NOT one of the 6 deep external hip rotators?

Rectus femoris

Hip Joint

Relatively stable due to: - Bony architecture - Strong ligaments - Large supportive muscles

Movements: In frontal plane right pelvis moves inferiorly in relation to left pelvis

Right lateral pelvic rotation

Movements: In horizontal plane pelvis rotates to body's right

Right transverse pelvic rotation

Joints: Posteriorly: - Sacrum is between the 2 pelvic bones and forms ?

Sacroiliac joints

Bones: extension of spinal column with 5 fused vertebrae

Sacrum

Movements: - Anterior & posterior pelvic rotation

Sagittal plane

T or F? The pubofemoral ligament is located anteromedially and inferiorly and limits excessive extension and abduction

True

T or F? The two pelvic bones join to form the amphiarthrodial joint referred to as the pubic symphysis pubis

True

Pelvic Bone: - Posterior & lower two fifths

ischium

The gluteus maximus muscle is located ____ and performs ____ of the hip joint

posteriorly; extension

Bones: - Origin for hip flexors

Anterior pelvis

What is the longest bone in the body?

- Femur

All pelvic girdle rotation results from motion at one or more locations

- Right hip - Left hip - Lumbar spine

T or F? The Pelvic girdle moves back and forth within 3 planes for a total of 6 different movements

True

T or F? Gluteus medius can perform both internal and external hip rotation due to different lines of pull of its anterior and posterior fibers

True

T or F? The femoral nerve innervates, in addition to many other muscels, pectineus and sartorius

True

T or F? Body movements usually involve entire pelvic girdle and hip joints?

True

Pelvic Bone: Anterior & lower one fifth

pubis