Lower Appendicular Skeleton (BYU EXSC 440 Lab)

Os Coxa

Ilium

Anterior superior iliac spine (ASIS)

Anterior inferior iliac spine (AIIS)

Iliac crest

Posterior Superior Iliac Spine (PSIS)

Posterior inferior iliac spine (PIIS)

Anterior gluteal line

Posterior gluteal line

Inferior gluteal line

Auricular surface of ilium

Iliac fossa

The broad, slightly concave inner surface of the ilium.

Arcuate line

a ridge of bone that runs inferiorly and anteriorly from the auricular surface

Greater sciatic notch

allows blood vessels and the large sciatic nerve to pass from the pelvis posteriorly into the thigh

Ischium

Lesser sciatic notch

inferior to ischial spine

Ischial spine

located superior to the ischial tuberosity and projects medially into the pelvic cavity

Ischial tuberosity

receives the weight of the body when sitting

Ischial ramus

bony extension projecting anteriorly and superiorly from the ischial tuberosity; joins with the inferior pubic ramus to form the ischiopubic ramus

Obturator foramen

Pubis

The medial anterior portion of the pelvis

Pubic tubercle

Pubic crest

thick anterior border

Superior pubic ramus

superior extension of the body of the pubis

Pectineal line of pubis

Obturator groove

Inferior pubic ramus

inferior extension of the body of the pubis; articulates with the ischium

Symphyseal surface

medial articulating surface between 2 pubis bones

Pubic symphysis

cartilaginous joint at which two pubic bones fuse together

Acetabulum

large socket in the pelvic bone for the head of the femur

Acetabular rim

outside edge of acetabulum

Lunate surface

Smooth articulating surface on the periphery of the acetabulum

Acetabular notch

deep notch in the inferior part of the brim

Acetabular fossa

circular depression located deep in the acetabulum

Femur

thigh bone

Head of femur

Fovea capitis

pit in the head of a femur

Neck of femur

Greater trochanter

A bony prominence on the proximal lateral side of the thigh, just below the hip joint.

Lesser trochanter

The projection on the medial/superior portion of the femur.

Pectineal line of femur

Intertrochanteric line

region formed anteriorly between the greater and lesser trochanters

Intertrochanteric crest

region formed posteriorly between the greater and lesser trochanters

Quadrate tubercle

Trochanteric fossa

depression on medial surface of greater trochanter

Shaft of femur

Gluteal tuberosity

back of femur; bump above the linea aspera that is on the upper portion of femur

Medial lip of linea aspera

Lateral lip of linea aspera

Medial supracondylar line

Lateral supracondylar line

Adductor tubercle

Medial epicondyle of femur

Lateral epicondyle of femur

Medial condyle of femur

Lateral condyle of femur

Intercondylar notch

Popliteal surface

Patellar surface

Patella

Base of patella

broad, flat surface at the proximal end

Apex of patella

point at the distal end

Anterior surface of patella

convex (bump upward) and rough

Articular surface of patella

articulates with the femur's patellar surface

Medial facet of articular surface of patella

Lateral facet of articular surface of patella

Always rests on the larger lateral side

Tibia

shin bone

Tibial plateau

the top, flat portion of the tibia

Intercondylar eminence

Medial condyle of tibia

Lateral condyle of tibia

articulates with lateral condyle of femur

Tibial tuberosity

point where the patellar ligament attaches

Gerry's tubercle

Shaft of tibia

Anterior border of tibia

sharp ridge of bone easily palpated because it is close to the surface

Interosseous border of tibia

small ridge running down the lateral side of the tibial shaft; for attachment of the interosseous membrane between the tibia and fibula

Soleal (popliteal) line

Fibular notch

lateral notch on the distal end tibia where tibia and fibula articulate

Medial malleolus

Fibula

Head of fibula

proximal end of fibula

Styloid process of fibula (aka the apex of the fibula)

sharp pointy end (lateral malleolus side)

Shaft of fibula

Lateral malleolus

Articular facet of lateral malleolus

Purple

Lateral malleolar fossa

red

Anterior border of fibula

Interosseous border of fibula

Medial border of fibula

blank red arrow

Talus

Talus (disarticulated)

Head of talus

Neck of talus

Trochlea of talus

articulates with tibia

Medial tubercle

1

Lateral tubercle

2

Groove for flexor hallucis longus tendon on talus

3

Calcaneus

heel bone

Sustentaculum tali

The anteromedial surface of the calcaneus that largely supports the talus.

Groove for flexor hallucis longus tendon on calcaneus