Lecture 25 – Humerus, Radius, and Ulna

Thank you all for reading the last lecture.  The numbers were dropping, and by simply asking everyone to remain with us, the numbers on the site rose even higher than before the drop off last week.  I know that time is valuable and I appreciate you for sharing a portion of your time with me.  In today’s world, everybody is bombarding us with messages.  I would not insist if you did not have a ‘body’.  So, since we all have bodies, none of us are exempt from knowing the basics and some advanced information.

As we delve further in the survey of our bodies, I will list guides to assist you in locating information as you need it.  In an effort to save time, I will recapitulate the topics we have studied so far.  Whenever you need to know a certain piece of information, you can refer to this guide.  If you like, I can provide a test for you to determine how much you have retained about your own anatomy.  Send a note to dr.danna.mckellar@gmail.com if you would like a copy of an anatomy test.

Index of Lectures and Labs

Lecture 1 Body Basics

Lecture 2 Common Anatomic Derivatives

Lecture 3 More Common Anatomic Derivatives

Lecture 4 Anatomic Derivatives

Lecture 5 Anatomic Derivatives

Lecture 6 Anatomic Derivatives

Lecture 7 Anatomic Derivatives

Lecture 8 Anatomic Derivatives

Lecture 9 Anatomic Derivatives

Lecture 10 Final Set of Anatomic Derivatives

Lecture 11 Bone Cells

Human Dissection Techniques – Advanced Anatomy Lab               

Lecture 12 Part 1 – The Power of Review

Bones – Axial and Appendicular Skeletons

Lecture 12 Part 2 – The Power of Review

Lecture 13 Skeletal System – Facial Bones

Lecture 14 Skeletal System – Nasal Bones, Hard Palate (Continued)

Human Dissection Techniques – Advanced Anatomy Lab #2

Lecture 15 Random Historical Facts in Medicine

Lecture 16 Survey of Bones (Continued)

Lecture 17 Review of Scientific Notation

Lecture 18 More Tips on Significant Digits

Lecture 19 Review of Conversion Factors

Lecture 20 Temperature Conversions

Lecture 21 Bone Density

Lecture 22 The Vertebral Column – Atlas and Adontoid Process

Lecture 23 The Thoracic Cavity

Lecture 24 The Vertebral Column

Lecture 25 Contains the index of the first 25 lectures; Details about humerus, radius, and ulna

On the anterior portion of the scapula, the corocoid process protrudes superiorly.  The short head of the biceps originate here.

Upper Extremity – Humerus

It has a head, which is divided by the anatomic neck.  The anatomic neck divides the head into the greater and lesser tubercles.  Immediately inferior to the head is the surgical neck of this bone, followed by the shaft.

On the distal end of the humerus, we have the lateral and medial epicondyles.  Tennis elbow is common at this site, and is simply inflammation of muscle on the lateral epicondyle.

Forearm – Radius is lateral

It also has a head.  The radial tuberosity is just below it.  The biceps insert here.

The ulna is medial.  Anteriorly, you can see the semi-lunar notch.  (Half-moon notch)  Proximally, we have the olecranon process.  (Bend your elbow and feel the point.

Distally, we have the styloid process for the wrist bones, or carpal bones.  (Silly Hint: Carpals can carry things!)  There are two rows, with each having four bones.  We have five metacarpals.  (Carpus)  The heads of the metacarpals are commonly called “knuckles”.  We have three phalanges in the fingers and two phalanges in the thumbs.  Do well with this information.



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