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HLSC 120 - Human Anatomy > Chapter 8 - Pelvis > Flashcards

Chapter 8 - Pelvis Flashcards

1
Q

How many bones make up the adult pelvis?

A

4 bones:
-sacrum
-coccyx
-right and left ossa coxae

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2
Q

Function of the Pelvis

A

-protect and support the viscera in the inferior part of the ventral body cavity (bladder, sex organs, fetus)
-support the weight of the body from the vertebral column

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3
Q

Pelvic Girdle

A

refers to the right and left ossa coxae only

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4
Q

Coxal (Hip) Bone

A

consists of three bones that fuse together:
-ilium
-ischium
-pubis

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5
Q

Pubic Symphysis

A

-joins the two coxal bones together ANTERIORLY
-fibrocartilage

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6
Q

Sacroiliac Joints

A

-join the hip bones and the sacrum together POSTERIORLY

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7
Q

The Ilium

A

-largest of the three hip bones
-forms the superior part of the hip bones

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8
Q

Ala of the Ilium

A

-superior fan shaped portion

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9
Q

Body of the Ilium

A

-lower portion of the ilium

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10
Q

Acetabulum of the Ilium

A

-socket where the femur articulates to form the hip joint

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11
Q

Iliac Crest

A

Hip Pointer

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12
Q

Greater Sciatic Notch

A

Where the sciatic nerve passes through

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13
Q

Gluteal Lines

A

-muscles attachment for the trunk, hip and thigh

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14
Q

Iliac Tuberosity

A

-upper thickened rough portion of the ilium
-attachment site for the posterior sacroiliac ligaments

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15
Q

Auricular Surface of the Ilium

A

-ear shaped area of the ilium

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16
Q

Arcuate Line

A

-bony ridge located on the inner medial surface

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17
Q

Iliac Fossa

A

-concave inner surface of the ilium

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18
Q

Ischium

A

-inferior and posterior part of the hip bone

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19
Q

Ischial Tuberosity

A

the part that meets the chair when you are sitting

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20
Q

Pubis

A

-inferior and anterior part of the hip bone

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21
Q

Inferior and Superior Rami

A

-inferior meets with ischium and superior meets with ilium
-join together to create acetabulum/hip socket

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22
Q

Pelvic Brim

A

a line from the sacral promontory to the upper part of the pubic symphysis

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23
Q

False/greater Pelvis

A

-lies above the pelvic brim
-contains no pelvic organs except when the urinary bladder is full, lower intestines, ovaries, uterus

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24
Q

True/lesser Pelvis

A

-bony pelvis inferior to the pelvic brim
-has inlet, outlet, cavity
-contains rectum, sex organs

25
Pelvic Axis
-the path of the baby during birth
26
Sacral Promontory
the part that articulates with the spine
27
Female Pelvis
-wider and shallower -pubic arch is greater than 100 degrees -more space in the true pelvis -pelvic brim is more oval -structure is light and thin -obturator foramen is oval -iliac crest is less curved -ilium is shorter -sciatic notch is wider angle
28
Male Pelvis
-bones are larger and heavier -pelvic inlet is smaller and heart shaped -pubic arch is less than 90 degrees -structure is heavy and thick -obturator foramen is round -iliac crest is more curved -ilium is taller -sciatic notch is more acute
29
Muscles of Coxal Joint and Thigh
-originate from pelvic girdle and vertebral column -insert on various places on the femur -most are massive muscles -are divided into the anterior, posterior, and medial groups
30
Functions of the Muscles
-stabilize the hip joint -provide support for the body during locomotion
31
I: Anterior Group of Muscles (need to know O and I)
flexors: -illiacus -psoas major -sartorius -rectus femoris
32
II: Posterior Gluteal Mucles
extensors, abductors, rotators -gluteus maximus -gluteus medius -gluteus minimus
33
III: Medial Muscles of the Thigh
adductors -adductor magnus -adductor longus -adductor brevis -gracilis -pectineus
34
IV: Deep Lateral Thigh Muscles
-lateral rotator muscles of the hip joint over the posterior aspect -piriformis -superior and inferior gemelius -obturator internus -obturator externus -quadratus femoris
35
V: Lateral Group (need to know O and I)
-tensor fascie latae
36
1. Iliacus (group I flexors)
O: iliac fossa of the ilium I: Lesser trochanter if the femur -flexes and rotates thigh laterally
37
2. Psoas Major (group I flexors)
-major and minor O: transverse process & body of lumbar vertebrae I: Lesser trochanter -flexes and rotates thigh laterally
38
3. Sartorius (group I flexors)
O: Anterior Superior Illiac Spine I: Medial surface of body of the tibia -the longest flexor and rotators muscle of the thugh -flexes, abducts, and rotates the leg medially
39
4. Rectus Femoris (group I flexors)
O: Anterior Inferior Illiac Spine I: Tibial Tuberosity -extends and flexes thigh at a hip joint
40
1. Gluteus Maximus (group II extensors and abductors)
-roundness of the buttocks -powerful hip extensor and lateral rotators
41
2. Gluteus Medius and Minimus (group II extensors and abductors)
-deeper -originate from ilium -abduct and medially rotate the thigh at the hip joint
42
Group III Medial Adductors
-adductors of the hip -some aid in hip flexion -have a common origin on the pubic bone -most insert on shaft of the femur
43
1. Adductor Magnus (group III adductors)
-largest -deep to the other adductors -adduct, rotate, and extend thigh at hip joint
44
2. Adductor Longus (group III adductors)
-near pubic symphyses -adducts, rotates, and flexes the thigh at the hip joint
45
3. Adductor Brevis (group III adductors)
-located in ramus and body of pubis -adducts, rotates, and flexes thigh
46
4. Gracilis (group IIL adductors)
-medial muscle -flexes knee and leg
47
5. Pectineus (group III adductors)
-adduct and flex thigh at the hip joint
48
Group IV Muscles
-all rotators and abductors that rotate the thigh laterally
49
Tensor Fasciae Latae (group V muscle)
O: Iliac crest/spine I: Tibia by the way of iliotibial tract -flexes and abducts thigh medially at the hip joint
50
Lumbar Plexus (L1-L5)
-forms medial and lateral plantar nerves
51
Cutaneous Innervation
-calf of the leg -plantar surface of the foot
52
Motor Innervation
-posterior thigh and leg muscles -intrinsic muscles of the foot
53
Femoral Nerve
-L2-L4 -thigh, leg, and foot -posterior division of the lumbar plexus -innervates: -anterior and medial portion of the thigh -medial side of the leg and foot
54
Obturator Nerve
-L2-L4 -only thigh -anterior division of the lumbar plexus -innervates: -medial and adductors muscles of the thigh
55
Femoral Nerve Motor Innervation
-quadriceps femoris -iliopsoas -sartorius -pectineus
56
Femoral Nerve Cutaneous Innervation
-anterior thigh -inferomedial thigh -medial side of the leg -most medial aspect of the foot
57
Obturator Nerve Motor Innervation
-adductors -gracillis -pectineus
58
Obturator Nerve Cutaneous Innervation
-superomedial thigh

HLSC 120 - Human Anatomy (9 decks)

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