Author: Outlander Anatomy

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Fun Fact: Linea Semilunaris

Anatomy Def: Lineae semilunares (pl.) are a pair of curved tendinous lines of the anterior abdominal wall; one on the left and one on the right, each traces the outer margin of its respective rectus abdominis muscle. 

Outlander Def: Jamie’s right belly line is taut, taut, taut as he gazes upon his beloved (red arrows in image) – it’s been a verra looooong time since I’ve seen ye, Sassenach!!! <G>

Learn about linea semilunaris in Anatomy Lesson 16, Jamie’s Belly or Scottish Six-Pack!

Linea semilunaris is a line where flat tendons of three abdominal muscles (external oblique, internal oblique and transversus abdominis) of one side meet the tendinous sheath enveloping the rectus abdominis muscle of the same side. Wow, what a mouth full!  Understand these lines are strong and fibrous.

Also, lineae semilunares are curve. Why? Because each line runs from 9th rib to pubic tubercle (attachment site). Because our 9th ribs are further apart and our pubic tubercles are closer together, each line assumes a curved shape, hence the name meaning “curved or half-moon.” Early anatomists were very poetic folk!

Although we all have a pair of linea semilunaris, the skin grooves overlying these lines are generally visible only in the fit and lean.  Jamie meets this criteria, and voilà, we see the excellent skin groove overlying his right linea semilunaris! He has a left one, too. Got it? Super-duper!

Fun Fact: Linea semilunaris has yet a third name, the spigelian line. Why? Well,  a hernia may develop among the fibrous layers of linea semilunaris and since this hernia was first described in the 1600s by Brussels anatomist- surgeon Adriaan van den Spiegel, the award goes to Spiegel!

Fortunately, spegelian hernias are small and rare, but also dangerous. If bowel works its way between the tight , fibrous layers of linea semilunaris, it may strangulate (lose its blood supply), creating a medical emergency! Interestingly, for unknown reasons, most spigelian hernias occur on the right side between the 4th and 7th decades of life. Yikes!

Read about Jamie’s belly in Voyager book. After 20 years apart, he and Claire hole up in an Edinburgh brothel.  Herself shares Claire’s astute assessment of her beloved:

We fell quiet again, but could not take our eyes away from each other. I looked him over carefully in the strengthening light, comparing memory to reality. A narrow blade of early sun knifed through the shutters’ crack, lighting a lock of hair like polished bronze, gilding the curve of his shoulder, the smooth flat slope of his belly. He seemed slightly larger than I had remembered, and one hell of a lot more immediate.

There was a momentary pause, and then I said, “Do you mean to tell me what you are, or shall I go on running down the disreputable possibilities until I come close?” “Oh, aye?” he said, entertained by this suggestion. “What’s your best guess?” I looked him over carefully. He lay at ease amid the tumbled sheets, one arm behind his head, grinning at me. “Well, I’d bet my shift you’re not a printer,” I said. The grin widened. “Why not?” I poked him rudely in the ribs. “You’re much too fit. Most men in their forties have begun to go soft round the middle, and you haven’t a spare ounce on you.”

See Jamie’s fit belly in Starz, episode 306, A. Malcolm. Nope, NOT a spare ounce. No the belly of a printer!!!

The deeply grateful,

Outlander Anatomist

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Photo credits: Sony/Starz