Fun Fact: Extensor Indicis

Anatomy def: Extensor indicis is a muscle of the extensor (back) forearm – its tendon extends (straightens) the index finger (pointer finger or forefinger).

Outlander def: Jamie’s pointer finger twitches madly as Claire and Jenny come face-to-face in their terse meet-and-greet. Tappity tap – a 20-year gap. Scary!

Learn about extensor indicis in Anatomy Lesson #23, Harming Hands – Helping Hands – Healing Hands.

Turns out, the index finger receives tendons from extensor indicis and extensor digitorum (covered in a earlier FF).  Both muscles lie in the back of forearm but the tendons cross the wrist and insert into bones of the index finger. The dual tendons straighten (extend) and lift the index finger, offering it greater strength in extension and more independent movement from the remaining three fingers.

Fun Fact: In US anatomy, the thumb is not counted as a finger, so index finger is the first. Across the pond, some European anatomists define the thumb as  the first finger, so index is counted as the second finger. Ergo, many surgeons prefer using: thumb, index, middle, ring and little fingers (or something similar) to omit possible mix-ups of finger numbers during surgery. Scary x2!

Rewatch Starz episode 308, First Wife, to see Jamie’s pointer finger flutter as he ponders the strain between first wife and big sista. Not good! 

Read about Jamie’s twitchy fingers in Voyager book. Actually, his tapping fingers appear in most of Diana’s books:  

I caught a quick glance passing between Ian and Jenny; and a longer stare, unreadable, exchanged between Jenny and Jamie. A stranger here in more ways than one, I kept my own eyes cast down, observing under the shelter of my lashes. Jamie sat to my left; I could feel the tiny movement between us as the two stiff fingers of his right hand drummed their small tattoo against his thigh.

See Big Red flutter his index finger in Starz episode 308, First WifeKebbie-lebbie at Lallybroch!

The deeply grateful,

Outlander Anatomist

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Photo credits: Sony/Starz

Fun Fact: Metacarpals

image of a woman's hands

Anatomy def: Metacarpals are one of 5 bones of the hand, situated between wrist and digits. Comparable bones of the foot are metatarsals.

Outlander def: Hand bones on which BJ plays snap, crackle, and pop! Or, was it knick knack paddy-whack, break the puir lad’s bones? Gah!

Learn the five metacarpals in Anatomy Lesson #22, Jamie’s Hand – Symbol of Sacrifice. Metacarpals are numbered 1-5 beginning with the thumb side. Together, five metacarpals form the bony skeleton in the palm of hand!

Read about metacarpals in Outlander book. But, of course, they are there! …Claire muses about metacarpals and Crainesmuir village while riding her pony behind Dougal!

In fact, I had amused myself on the ride to the smithy by imagining an aerial view of the village as a representation of a skeletal forearm and hand; the High Street was the radius, along which lay the shops and businesses and the residences of the more well-to-do. St. Margaret’s Lane was the ulna, a narrower street running parallel with the High, tenanted by smithy, tannery, and the less genteel artisans and businesses. The village square (which, like all village squares I had ever seen, was not square at all, but roughly oblong) formed the carpals and metacarpals of the hand, while the several lanes of cottages made up the phalangeal joints of the fingers.

See Claire massage the healing metacarpals of Jamie’s left hand during opening credits of S.2!

A deeply grateful,

Outlander Anatomist