Typical Ribs Study Notes

TYPICAL RIBSTYPICAL RIB FEATURESEach Rib has 3 parts -AAnterior EndBPosterior EndE Shaft.ANTERIOR (COSTAL) END :It bears -small cup shaped depression, which joins the correspondingcostal cartilage to form a primary Cartilaginous "costochondral Joint".POSTERIOR (VERTEBRAL) END: It presents - Head, Neck & TubercleHEAD - Contains - 2 articular facets - Lower and UpperLOWER: 1 The of lower larger facet articulates with the bodynumerically corresponding vertebra DIPANKAR RAYUPPER: - The vertebra. upper smaller facet articulates with the next higherThe Crest separating the two articular facers lies opposite theintervertebral disc.ATTACHMENTS:-1Anteriorly - Head provides attachment to theradiate ligament and is related to theNECK of Crest the of costovenebral Head - Sympathet's provides joint attachment chain and to costal the pleura. Intraarticular ligament2(2) 2 - Superior & Inferior and 2 surfaces 1 Anterior & Posteriorborders (1 Lies in front of transverse process of corresponding vertebra(4) Upper Border - Sharp Crest like, Lower Barder 1 Rounded(3) Anitrier Surface - Smooth , Post Surface - Rough & pierced by foraminaATTACHMENTS: - (1) Anterior Surface - Covered by Costal DIPANKAR Pleura RAY(2) Rough Crest Posterior Surface:- Attached with Inferior Castotansverse ligament(3) of Neck:- Two laminae of the Superior Costotransverseligament are attached to it. TYPICAL RIB2TUBERCLE1)Situated on the outer surface of the ribat the junction of meek and shaft.(2) Divided into 2 parts - Medial and lateral parts(3) MEDIAL PART:- Medial parti is articular and bears a smalloval of facet, which articulates with the transverse processcorresponding vertebraDIPANKAR RAY(4) LATERAL PART:- Lateral part is non-articularATTACHMENT:- Lateral non-articular part of the TubercleSHAFT:gives attachment to lateral castotransverse ligamenz(1) It is Thin and Flatted.(2) Presents - - 2 Surfaces- - Outer and Inner,2 Berders-Upper and Lower2 Angles Anterior and PosteriorDIPANKAR RAYBORDERS :- SUPERIOR BORDER: Thick and rounded and presentsouter and mner lips.ANACHMENT: - Inner Outer lip gives attachement to - Ext Intercostal Musdes.lip gives attachment to - Int Intercostal MuselesLOWER BORDER :- - Sharp costal and forms the lower and border Intercostalis of the intimus MusclesgrooveATTACHMENT:- 1 Gives Origin to - External Intercostal Muscles.SURFACESOUTER SURFACE: :- It is smooth and convex and presentstwo angles - Posterior and AnteriorPosterior Angle:- It is marked by an oblique lime.Anterior Angle: It is marked by an indistinct oblique time. TYPICAL RIB3INNER SURFACE :- It is smooth and concave. It presents acostal groove near its lower border. The Costal groove becomeunregognizible in anterior part.DIPANKAR RAY.COSTAL GROOVELodges intercostal nerre and vessels fromabove downwands as follows (Mmanonic VAN)(i) Interrostal Vein (ii) Intercostal Artery (iii) Intercostal Nerve.ATTACHMENT :-1The Intercostal Muscles is attached to the floornerves and vessels and bone).of the groove (Incevening between -Intercostal2The Intercostalis Intimus. is attached to the upper borderof the costal groove