Download Ulna landmarks – Anterior view, right side, except where noted

Ulna landmarks – Anterior view, right side, except where noted
coronoid process
The coronoid process of the
ulna is the insertion for:
1. brachialis.
The coronoid process of the
ulna is the origin for:
1. one head of the pronator
teres,
2. one head of the flexor
digitorum superficialis.
head
The head is an important
landmark of the ulna
because it is the
articulating surface for
the ulna of the distal
radioulnar joint. It
articulates with the ulnar
notch of the radius. This
is a pivot joint (uniaxial)
in that it allows for
rotation to provide for
supination and pronation
of the hand.
olecranon process
posterior view
The olecranon process
is the insertion for:
1. anconeus (lateral
aspect),
2. triceps brachii.
The olecranon process
is the origin for:
1. one head of the
flexor carpi ulnaris.
radial notch
The radial notch is an
important landmark of the ulna
because it is the proximal
articulating surface for the ulna
of the radioulnar joint. It
articulates with the head of the
radius. This is a pivot joint
(uniaxial) in that it allows for
rotation to provide for
supination and pronation of the
hand.
styloid process
posterior view
trochlear
(semilunar) notch
The styloid process of the
ulna is functionally
important because there is a
ligament running from it to
the wrist. The styloid
process of the ulna is also
the insertion for:
1. brachioradialis (lateral
side of the base of the
styloid process).
The trochlear (semilunar) notch is an
important landmark of the ulna
because it is the articulating surface
for the ulna of the humeroulnar joint
that articulates with the trochlea of
the humerus. This is a hinge joint
allowing for flexion/extension. Dr. J
recommends that you remember that
the trochlea notch articulates with
the trochlea, which makes it a Grant
thing.