Ch 12 · Lesson 14

Biceps brachii: anatomy and prescription Latin

Muscle names are a describing word plus a genitive: the two-headed one of the arm. Then , in die and on a prescription.

The short version

Muscle names run on the genitive

dorsi

the broadest (muscle) of the back
Why?

Many muscle names are a word describing the muscle plus the genitive of the body part: biceps brachii, the two-headed (muscle) of the arm; dorsi, the broadest of the back. A plural part takes the genitive plural: flexor , the bender of the fingers.

Anatomy: the genitive at the gym

genitivefeminineneuterWhat do the colours mean?

Many muscle names are a word describing the muscle plus the genitive of the body part it belongs to: the two-headed one of the arm.

A friendly full-length figure standing with arms held out: a round smiling head with orange hair, a green top, blue trousers and black shoes.
  1. brachium

Caput, the head; os, the mouth (per os, by mouth); manus, the hand; brachium, the arm (biceps brachii, the two-headed muscle of the arm); pes, the foot.

MuscleLiterally
biceps brachiitwo-headed, of the arm
triceps suraethree-headed, of the calf
dorsibroadest, of the back
erector spinaethe raiser of the spine
levator scapulaethe lifter of the shoulder blade
flexor the bender of the fingers
quadratus lumborumsquare, of the loins

and lumborum are genitive plurals: more than one finger, more than one loin. Biceps is bi- plus , two-headed; its plural is bicipites.

Where there is no genitive, there is agreement, feminine on feminine and neuter on neuter:

  • vena cava - the hollow vein.
  • medulla oblongata - the elongated marrow.
  • - the great hole, at the base of the skull.

Prescription Latin

Medical shorthand is one of the few places Latin is still written daily, mostly by people who do not know they are writing it:

Abbrev.LatinMeans
p.o. by mouth
NPO nothing by mouth
b.i.d. twice a day
t.i.d.ter three times a day
q.i.d.quater four times a day
p.r.n. as needed
immediately
Rxtake!

is per with the accusative of , mouth, which looks the same as the nominative. is in with the ablative: in a day.

is literally for the matter having arisen. is an imperative, an order to the pharmacist.

Mistakes English speakers make

WrongRightWhy
Quercus Quercus tree names in -us are feminine
Sapiens sapiensthe epithet is always lower case
T-T. is lower case; T. is the
a bicepa bicepsbiceps is one two-headed muscle
one one speciesspecies is singular and plural
genusesthe Latin plural of

Going further: Why Latin: 1753 and 1758 and the rest of the guide, when you want them. This lesson does not need them.

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Lesson 14 of 17 in this chapter

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What do the colours mean?