Anatomy of fibula LL bone part-5 fibula details, side determination, ossification and it's clinical anatomy. fibula is lateral and smaller bone. Like, share and comment. Thank You!!

1. Anatomy Of Fibula
LL Bone
Part-5
BY PURVI SHAH
B.P.T

2. Fibula

3. Fibula
It is the lateral and smaller bone of the leg.
It is very thin as compared to the tibia.
It is homologous with the ulna of the upper limb.

4. Side Determination
Upper end and head is expanded in all directions.
Lower end or lateral malleolus is expanded AP direction and
flattened from side to side.
Medial side of lower end bears a triangular articular facet
anteriorly and a deep or malleolar fossa posteriorly.

5. Features
Fibula has an upper end, shaft and lower end.
UPPER END: Expanded
 Superior surfaces bears a circular articulate facet; which articulate
with lateral condyle of tibia.
 The Apex of head styloid process projects upwards from its
posterolateral aspect.
 Constriction below head is known as neck of the fibula.

7. Features
SHAFT: Three Borders
1.Anterior
2.posterior
3.interosseous
Three Surfaces
1.Medial (it is very narrow measuring 1 mm or less)
2.Lateral
3.Posterior

9. Features
LOWER END: The tips of lateral malleolus is 0.5cm lower than
medial malleolus.
 Anterior surface is 1.5 cm posterior to the that of the medial
malleolus.
 It has four surfaces: Anterior (rough)
Posterior
Lateral (subcutaneous)
Medial ( bears triangular articular facets)

10. Functions
The fibula's role is to act as and attachment for muscles, as well as
providing stability of the ankle joint.
The fibula is a non-weight-bearing bone.

11. Attachments
Proximally,
Extensor digitorum longus Superior 3/4 of medial border of fibula,
Extensor hallucis longus Middle of anterior surface
Fibularis tertius Inferior 1/3 of anterior surface
Fibularis longus Fibular head and superior 2/3 of lateral surface

12. Fibularis brevis Inferior 2/3 of lateral surface
Soleus Fibular head (posterior) and superior 1/4 of posterior
surface
Flexor hallucis longus: Inferior 2/3 of posterior surface
Flexor digitorum longus Via tendon
Tibialis posterior Posterior surface
Attachments

14. Attachments

15. Blood Supply
Peroneal artery gives off nutrient artery for fibula, which enters
bone on its posterior surface.

16. Articulations
Proximal tibiofibular joint
Distal tibiofibular joint

17. Ossifications
The fibula ossifies from the one primary and two secondary
centres.
The primary centre for the shaft appears during 8th week of
intrauterine life.
A secondary centre for lower end appears during first year and
fuse with shaft by about 16 years.

18. Clinical Anatomy
The upper and lower ends of the fibula are subcutaneous and
palpable
Common peroneal nerve can be rolled against the neck of fibula;
this nerve commonly injured here.
It leads of foot drop
The fibula is an ideal spare bone for a bone graft.

19. The most common area for fibula fractures are 2-6 cm proximal to
distal end of fibula.
It is associated with ankle fracture.

21. Thank You