Download MBBS (Bachelor of Medicine, Bachelor of Surgery) Human Anatomy ppt lectures Topic 84 Arches Of Foot Notes. - anatomy ppt free download human anatomy ppt lectures, medicine notes ppt, anatomy handwritten notes pdf, mbbs 1st year anatomy notes pdf download, best anatomy notes pdf, human anatomy notes pdf, anatomy easy notes pdf, anatomy notes online, anatomy short notes, Anatomy ppt, Powerpoint Presentations and lecture notes.
FUNCTIONS OF FOOT
Support body weight
Serves as a lever to propel
the body forward in walking
& running
FUNCTIONS OF FOOT
IF THE FOOT
Gastrocnemius & plantaris
POSSESSED A
SINGLE BONE
It cannot adapt itself
to uneven surfaces
Its propulsive action
depends entirely on
gastrocnemius &
plantaris
BUT
FUNCTIONS OF FOOT
IF THE FOOT IS
FORMED OF
SMALL BONES
& MANY
JOINTS
It can adapt itself
to uneven surfaces
Long flexors &
small muscles of
foot assist in
propulsive action
WHY THERE ARE ARCHES?
A segmented structure can hold up weight
only if it is built in the form of arches
Weight will be distributed on: 1) the heel
(behind) & 2) heads of metatarsal bones (in
front): pressure will be minimized on nerves
& vessels in sole
Forward propulsive action will be easier
FOOT DIVISION
Hind-foot
Mid-foot
forefoot
CLASSIFICATION OF ARCHES
? A. Longitudinal
1. medial
2. lateral
? B. TRANSVERSE
1. ANTERIOR
2. POSTERIOR
ARCHES OF FOOT
MEDIAL
LONGITUDINAL
ARCH:
Higher than lateral
arch
Formed of:
calcaneum, talus
(key stone),
navicular, three
cuneiform & first
three metatarsal
bones
ARCHES OF FOOT
LATERAL
LONGITUDINAL
ARCH:
Lower than medial
arch
Formed of: calcaneum,
cuboid (key stone),
fourth & fifth
metatarsal bones
ARCHES OF FOOT
TRANSVERSE ARCH:
It is only half an
arch
It is formed of:
bases of metatarsal
bones, cuboid &
three cuneiform
bones
FACTORS MAINTAINING
ARCHES OF FOOT
Shape of bones
Strength of ligaments
Tone of muscles
MECHANISM OF ARCH SUPPORT
SHAPE OF
BONES
Bones are wedge-shaped
with the thin edge lying
inferiorly
This applies particularly
to the bone occupying
the center of the arch
"keystone"
MECHANISM OF ARCH SUPPORT
INFERIOR
EDGES OF
BONES ARE
TIED
TOGETHER
MECHANISM OF ARCH
SUPPORT
INFERIOR EDGES OF BONES
ARE TIED TOGETHER
Medial longtitudinal arch: plantar
calcaneonavicular ligament, tibialis
posterior
Lateral longtitudinal arch: long & short
plantar ligaments
Transverse arch: deep transverse ligaments,
transverse head of adductor hallucis, dorsal
interossei
MECHANISM OF ARCH SUPPORT
TYING THE
ENDS OF THE
ARCH
TOGETHER
MECHANISM OF ARCH
SUPPORT
TYING THE ENDS OF THE ARCH
TOGETHER
Medial longtitudinal arch: plantar
aponeurosis, medial part of flexor
digitorum longus & brevis, flexor
hallucis longus, flexor hallucis brevis,
abductor hallucis
Lateral longtitudinal arch: plantar
aponeurosis, lateral part of flexor
digitorum longus & brevis, abductor
digiti minimi, flexor digiti minimi
Transverse arch: peroneus longus
MECHANISM OF ARCH SUPPORT
SUSPENDING
THE ARCH
FROM ABOVE
MECHANISM OF ARCH
SUPPORT
SUSPENDING THE ARCH
FROM ABOVE
Medial longtitudinal arch:
tibialis anterior, tibialis
posterior, medial ligament of
ankle joint
Lateral longtitudinal arch:
peroneus longus, peroneus
brevis
Transverse arch: peroneus
longus
PES PLANUS (FLAT FOOT)
A condition in which the medial
longitudinal arch is depressed
The forefoot is everted
The head of talus is forced downward &
medially
The causes are both congenital and
acquired
This post was last modified on 05 April 2022