Download 7.10 Upper Limb

7.10 Upper Limb
Natalia, Zahraa, Jihan
Objectives
Content Objective: Students will be able to show understanding of the upper limb
including the humerus, radius, ulna, and the hand.
Language Objective: Students will complete an exit ticket after the presentation
to show their understanding of the powerpoint.
Upper Limb
●
●
●
Provide the structure of the arm, forearm, and hand
Provide attachments and functions for muscles
Upper limb includes a humerus, radius, ulna, and the hand.
Humerus
●
●
●
The humerus is a long bone that extends from the scapula (shoulder blade)
to the elbow
At the upper end of the humerus, is a smooth round head that fits into the
scapula
Below the head, is called the greater tubercle and lesser tubercle on the
lateral side and anterior side that provide attachment for muscles
Humerus cont.
Radius
●
The radius is located on the thumb side of the forearm
○
●
●
●
Extends from the elbow to the wrist and crosses over the ulna and rotates which rotates and
allows the hand to turn at the wrist
There are many muscles to the arm and forearm on the radius to provide
motion to the upper limb.
The radial tuberosity, located below the head of the radius is an attachment
for the muscle bicep, which bends the upper limb at the below
The radius is lateral to the ulna
Radius Cont.
Hand
●
●
●
Made up for wrist, palm, and fingers
Wrist consist of eight small carpal bones
○
○
Aligned firmly by rows of 2, four bones in each
Carbus attaches to fibrous disc on the ulnar side
○
Bones are cylindrical meaning rounded
distal ends that form knuckles and a fist
In line with each finger and also the
framework of the palm or metacarpus
○
○
Articulate near wrist and distal from phalanges
Each finger have three parts
■ Proximal, middle and distal phalanx
Ulna
➔
➔
➔
➔
One of two long bones
Longer/parallel than the radius
Lays on top of the end of the humerus posteriorly
Located on the side opposite of the thumb
Ulna Processes
➔ Two processes~Olecranon process
-Boney tip of the elbow, tricep muscle
~ Coronoid process
-forms the lower part of the trochlear notch,
brachial muscle
➔ Both provide movement for the muscles
The End of the Ulna
➔
➔
➔
➔
➔
Knob like head
Touches the Notch of the radius
Fibrocartilage disc
Connects the ulna to the wrist
Styloid process- attachment of wrist
ligaments
Exit Ticket
What does the upper limb have to do with?
a) Leg, Knee, Foot
b) Hand, Forearm, Arm
c) Neck, Spinal Cord, Skull
What is the Radius Lateral to?
a) Ulna
b) Wrist
c) Elbow
Quick sketch what a Ulna looks like.
(Hint: it’s in your forearm)