Lecture 8 – Anatomic Derivatives

Prefix/Suffix                            Meaning/Derivation                           Example         

Intr-                                         L, within                                              intravenous – within the vein

Linea –                                     L, line                                                  linea alba – white lineliterally, a white line of connective tissue composed of collagen.  Linea alba is formed by the fusion of the aponeuroses of the abdominal muscles, and it separates the left and right rectus abdominis muscles.  The slang ‘six-pack’ is formed by the depression between the left and right rectus abdominis muscle.  You can feel and visualize linea alba on toned individuals.  Linea alba does not contain nerves or blood vessels, making it a great place to enter the abdomen surgically.  Vanity has caused many women to desire a horizontal or ‘bikini cut’ during caesarean section.  I understand wanting to keep the school girl image, but linea alba is the best anatomical approach.  Many women complain of decreased feelings in the stomach after bikini cuts, due to all of the nerves that are severed.

Lingua-                                                L, tongue                                 lingual artery – the second branch of the external carotid artery.  Located on the underside of the tongue, this is how the tongue receives its blood supply.

Meta –                                      G, beyond                                            metatarsal – beyond the tarsal.  A group of five long bones in the foot, located between the tarsal bones of the hind- and the mid-foot, and the phalanges (toes).  (Remember:  Hands have phalanges, also.)  They do not have names, but are numbered 1 through 5, beginning at the medial side, which is the side of the big toe.  Starting with either foot, begin counting with the big toe: 1st, 2nd, 3rd, 4th, and 5th metatarsal.  The 5th metatarsal is often broken by ballerinas and is thus named ‘the dancer’s fracture.’

Myo-                                        G, muscle                                            myofascial pain syndrome- MPS- Also known as chronic myofascial pain (CMP) – A syndrome that is characterized by chronic and in some cases severe muscle pain.  It is associated with ‘trigger points’ or localized painful lumps or nodules in any of the body’s muscles or fascia.  Other symptoms include restrictive movement, referred pain, and sleep disturbances.  Do not confuse with fibromyalgia, which is similar.  The main difference is with the pattern of pain.  Fibromyalgia by definition is generalized pain, or pain that is evenly distributed above and below the waist.  MPS is localized or confined to specific areas.  It is possible to have both conditions.

Continue to review the terms we have covered the past few lectures.  We have only 16 more derivatives to cover before we build upon the knowledge of our bodies.  Following the derivatives we will do an extensive survey of bones, and proceed to an intense survey of our blood.  Many times the curriculum calls for a discussion of muscles immediately after bones.  I prefer to discuss blood immediately after bones due to the relationship between blood and bones.  Thank you for being patient and waiting on the next lecture.  I have been traveling and time has been limited.  I hope you are having a wonderful summer!



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