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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)