Slideshow: Humerus
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The Humerus
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Transcript of Slideshow: Humerus
The Humerus
The humerus is the
longest and
strongest bone
in the upper limb
The Humerus
It is the only bone in the arm
It is a long bone
The Humerus
It may be divided into
thirds along its
length
The Humerus
It may be divided into
thirds along its
length
The Humerus
It may be divided into
thirds along its
length
Proximal third
The Humerus
It may be divided into
thirds along its
length
Proximal third
Middle third
The Humerus
It may be divided into
thirds along its
length
Proximal third
Middle third
Distal Third
The Humerus
The Humerus
articulates proximally
at the Shoulder joint
The Humerus
The Humerus
articulates distally
at the Elbow Joint
The Humerus
The Humerus is
expanded at either end
The Humerus
The Humerus is
expanded at either end
There are a number of
interesting projections
The Humerus
Right side
The Proximal Humerus
Posterior ViewAnterior View
The Humerus
Right side
The Proximal Humerus
Posterior
Anterior
Superior or Bird’s Eye View
The Humerus
Right side
Head of Humerus
Posterior ViewAnterior View
The Humerus
Right side
Lesser Tuberosity
Anterior View Superior View
The Humerus
Right side
The Subscapularis muscle attaches to the Lesser Tuberosity of the Humerus
It arises from the whole of the ventral surface of the scapula
It adducts and internally rotates the arm
SubscapularisThe Humerus
Bicipital Groove
Anterior View Superior View
The Humerus
Right side
Bicipital Groove
The Long Head of Biceps Tendon originates from the superior rim of the glenoid of the scapula
It passes through the shoulder joint and enters the bicipital groove
The Humerus
Bicipital Groove
The Biceps muscles attaches distally to the radius
It flexes the elbow joint and supinates the forearm
The Humerus
Greater Tuberosity
Anterior View Posterior View
The Humerus
Greater Tuberosity
Superior or Bird’s Eye View
The Humerus
Anterior
Posterior
Anterior
Posterior
Superior or Bird’s Eye View
The Humerus
3 muscles attach to the Greater Tuberosity
The Humerus
3 muscles attach to the Greater Tuberosity
Supraspinatus
Infraspinatus
Teres Minor
Suprapinatus attaches to the upper part of the
Greater Tuberosity of the Humerus
Anterior
Posterior
Superior or Bird’s Eye View
The Humerus
It arises from the
Supraspinous Fossaof scapula
Suprapinatus attaches to the upper part of the
Greater Tuberosity of the Humerus
It abducts the arm
The Humerus
Posterior View
The Humerus
Infraspinatus attaches to the posterior part of the
Greater Tuberosity of the Humerus
It arises from the
Infraspinous Fossaof scapula
It externally rotates
the arm
Infraspinatus attaches to the posterior part of the
Greater Tuberosity of the Humerus
The Humerus
Posterior View
The Humerus
Teres Minor attaches to the postero-inferior part of
the Greater Tuberosity of the Humerus
The Humerus
Teres Minor attaches to the postero-inferior part of
the Greater Tuberosity of the Humerus
Posterior View
It arises from the
upper part of lateral
border of the scapula
It externally
rotates the arm
Anterior View
3 muscles attach to the bicipital groove and its margins
Anterior View
Pectoralis Major attaches to the lateral lip of the bicipital groove
Anterior View
Pectoralis Major attaches to the lateral lip of the bicipital groove
Anterior View
Latissimus Dorsi attaches to the floor of the bicipital groove
Anterior View
Latissimus Dorsi attaches to the floor of the bicipital groove
Anterior View
Teres Major attaches to the medial lip of the bicipital groove
Anterior View
Teres Major attaches to the medial lip of the bicipital groove
Anterior View
Pnemonic for muscles attaching to the
bicipital groove
A Lady between two Majors
Anterior View
Lady between two Majors
Latissimus Dorsi
Anterior View
Lady between two Majors
Latissimus Dorsi between
Pectoralis Major
Anterior View
Lady between two Majors
Latissimus Dorsi between
Pectoralis Major
Teres Major
Deltoid attaches to the lateral aspect of the shaft of the humerus
Deltoid attaches to the lateral aspect of the shaft of the humerus
Coracobrachialis attaches to the medial aspect of the shaft of the humerus
Coracobrachialis attaches to the medial aspect of the shaft of the humerus
Brachialis attaches to the anterior aspect of the distal half of the humerus
Brachialis attaches to the anterior aspect of the distal half of the humerus
Triceps Lateral Head
Triceps Lateral Head
Triceps Medial Head
arise from posterior shaft
Triceps Lateral Head
Triceps Medial Head
arise from posterior shaft
The Humerus
The Distal Humerus
Anterior View Posterior View
The Humerus
Medial Epicondyle
Anterior View Posterior View
The Humerus
Medial Epicondyle
Medial View
Medial Epicondyle gives attachment to the common
flexor origin
The following muscles attach here
Anterior View
Pronator teres
Flexor carpi radialis
Palmaris longus
Flexor digitorum superficialis
Flexor carpi ulnarisAnterior View
Medial Epicondyle gives attachment to the common
flexor origin
The Humerus
Trochlea
Anterior View Posterior View
The Humerus
Trochlea
Medial View Inferior View
The Humerus
Trochlea
The Trochlea articulates with the proximal Ulna at the elbow joint
The Humerus
Coronoid Fossa
Anterior View
The coronoid fossa articulates with the coronoid process of the ulna
Posterior view
Olecranon fossa
The olecranon process of the ulna articulates
with the olecranaon fossa
The Humerus
Capitulum
Anterior View Posterior View
The Humerus
Capitulum
The Capitulum articulates with the head of the Radius at the elbow joint
The Humerus
Radial Fossa
Anterior View
The radial head articulates with the radial fossa in flexion of the elbow
posterior view
Medial epicondyle
posterior view
Lateral supracondylar ridge
posterior view
posterior view
Lateral supracondylar ridge
gives rise to
Brachioradialis
posterior view
Lateral supracondylar ridge
gives rise to
Brachioradialis
posterior view
Lateral supracondylar ridge
gives rise to
Brachioradialis
posterior view
Lateral supracondylar ridge
gives rise to
Extensor Carpi Radialis Longus
posterior view
Lateral supracondylar ridge
gives rise to
Extensor Carpi Radialis Longus
Posterior view
Lateral epicondyle
gives attachment to the common extensor origin
Posterior view
Extensor Carpi Radialis Brevis
Extensor Digitorum
Extensor Carpi Ulnaris
Extensor Digiti Minimi
Posterior view
Anconeus muscle
attaches just below the common extensor origin
Posterior view
Anconeus muscle
attaches just below the common extensor origin
Nerves
There are 3 nerves closely related to the humerus
There are 3 nerves closely related to the humerus
Axillary nerve
touches the posterolateral aspect of the surgical neck
of humerus
There are 3 nerves closely related to the humerus
Radial nerve
touches the lower end of the spiral groove on the
lateral aspect of the lower part of the humeral shaft
There are 3 nerves closely related to the humerus
Ulnar nerve
touches the posterior aspect of the medial
epicondyle of humerus
There are 3 nerves closely related to the humerus
Axillary nerve
Radial nerve
Ulnar nerve
