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David Robson

David Robson

Dr David Robson is a practicing anatomist based in Edinburgh, author of the 7-part "Robson's Approach to Anatomy" encyclopedia and lifetime member of the Royal Society of Medicine.

Sep 18, 2026

6:15
Does that
6:15
help? It helps, because...
6:18
When you look in the vertebral column, it comes down to L5, and L5 is like a red-shaped bone.
6:24
The anterior, the front part of the body, is wider than the posterior part.
6:28
And the disc between L5 and the first circular vertebra, the L5-S1 disc, is triangular in shape, broader at the front, narrower at the back.
6:38
So when you have the vertebral column with the sacrum, and you're standing up, all of your body's weight is transmitted down the vertebral column to L5.
6:47
L5 then radiates out laterally, passes through the joint between the hip bone and the sacrum, which is called the sacroiliac joint.

10 MINS LATER

16:28
Well, going back as far as the 11th century, just like that and beyond.
7:22
Published in 77 A.D. It's
7:24
in his book, Natural Histories, Pilner the Elder.
7:27
And that's the first time there's an anatomical term that's mentioned.
7:34
So that's gone back in history a little bit for you.
7:38
Now you just asked the question, well, when did it change its name? It changed its name in 1522.
7:48
There was an Italian anatomist called Jacob Berengario di Carpi, born in 1460 and died in 1530.
7:58
And he decided to change the name from C7 to the first cervical vertebra, and it was then known as the atlas.

6 MINS LATER

13:45
moment.

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