Study Guide - Quick Reference - Pecs Lats and Teres Major

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In this lecture we will be discussing the Pectoralis Major, Latissimus Dorsi & Teres Major:


  • Pectoral (n.) early 15c., “ornament worn on the breast,” from Middle French pectoral and directly from Latin pectorale “breastplate,” noun use of neuter of adjective pectoralis (see pectoral (adj.)). – As a shortened form of pectoral muscle, attested from 1758. Slang shortening pec for this is first recorded 1966. Related: Pectorals; pecs. (Etymology Online)
  • Latissimus - From Latin lātissimus (“widest, broadest”), superlative of lātus (“wide, broad”) (Wiktionary)
  • Dorsi - dorsal (adj.) early 15c., from Old French dorsal (14c.) or directly from Medieval Latin dorsalis, corresponding to Latin dorsualis "of the back," from dorsum "back," of uncertain origin. (Etymology Online)
  • Teres - of latin origin referring to "round" or "cylindrical" (Wikipedia)
  • Major - major (adj.) c.1300, from Latin maior (earlier *magjos), irregular comparative of magnus "large, great" (see magnate). (Etymology Online)

What joint do these muscles cross?

These muscles originate on the axial skeleton (except the Teres Major which originates on the lateral border of the scapula) and insert into the bicipital groove