TIBIA n

Anatomy

1. TIBIA

2. BONY FEATURES: SIDE DETERMINATION FEATURES: UPPER END SHAFT LOWER END

3. UPPER END MEDIAL CONDYLE LATERAL CONDYLE INTERCONDYLAR AREA TIBIAL TUBEROSITY

4. SHAFT BORDERS: ANTERIOR BORDER : EXTENDS FROM TIBIAL TUBEROSITY (ABOVE) TO ANTERIOR BORDER OF MEDIAL MALLEOLUS (BELOW) IT IS SUBCUTANEOUS FORMS THE SHIN MEDIAL BORDER: EXTENDS FROM MEDIAL CONDYLE (ABOVE) TO POSTERIOR BORDER OF MEDIAL MALLEOLUS (BELOW) IT IS ROUNDED INTEROSSEUS / LATERAL BORDER: IT EXTENDS FROM LATERAL CONDYLE , A LITTLE BELOW AND IN FRONT OF FIBULAR FACET, TO THE ANTERIOR BORDER OF FIBULAR NOTCH

5. SURFACES: LATERAL: LIES B/W ANTERIOR & INTEROSSEUS BORDERS UPPER 3/4 TH ->CONCAVE & DIRECTED LATERALLY LOWER 1/4 TH -> DIRECTED FORWARDS MEDIAL: LIES B/W ANTERIOR & MEDIAL BORDERS IT IS BROAD & MOST OF IT IS SUBCUTANEOUS POSTERIOR: LIES B/W MEDIAL & INTEROSSEUS BORDERS IT IS WIDEST AT ITS UPPER PART -> CROSSED OBLIQUELY BY A ROUGH RIDGE CALLED SOLEAL LINE SOLEAL LINE : IT BEGINS JUST BEHIND THE FIBULAR FACET, RUNS DOWNWARD & MEDIALLY, AND TERMINATES BY JOINING THE MEDIAL BORDER AT THE JUNCTION OF ITS UPPER & MIDDLE THIRDS ABOVE THE SOLEAL LINE, THE POSTERIOR SURFACE IS IN THE FORM OF A TRIANGULAR AREA. THE AREA BELOW THE SOLEAL LINE IS ELONGATED -> DIVIDED INTO MEDIAL & LATERAL PARTS BY A VERTICAL RIDGE

6. LOWER END IT IS SLIGHTLY EXPANDED MEDIALLY, IT IS PROLONGED DOWNWARDS AS THE MEDIAL MALLEOLUS IT HAS 5 SURFACES: ANTERIOR SURFACE: HAS AN UPPER SMOOTH PART & A LOWER ROUGH AND GROOVED PART MEDIAL SURFACE: IT IS SUBCUTANEOUS IT IS CONTINOUS WITH THE MEDIAL SURFACE OF MEDIAL MALLEOLUS LATERAL ASPECT: IT PRESENTS A TRIANGULAR FIBULAR NOTCH TO WHICH THE LOWER END OF FIBULA IS ATTACHED THE UPPER PART OF THE NOTCH IS ROUGH THE LOWER PART IS SMOOTH AND MAY BE COVERED BY HYALINE CARTILAGE INFERIOR SURFACE: IT IS ARTICULAR -> ARTICULATES WITH SUPERIOR TROCHLEAR SURFACE OF TALUS TO FORM THE ANKLE JOINT MEDIAL ARTICULAR SURFACE OF MEDIAL MALLEOLUS:

7. MUSCLE ATTACHMENTS ON UPPER END: MEDIAL CONDYLE: SEMIMEMBRANOSUS CAPSULAR LIGAMENT OF KNEE JOINT LATERAL CONDYLE : ILIOTIBIAL TRACT CAPSULAR LIGAMENT OF SUPERIOR TIBIOLOFIBULAR LIGAMENT EXTENSOR DIGITORUM LONGUS PERONEUS LONGUS INTERCONDYLAR AREA: ANTERIOR HORN OF MEDIAL MENISCUS ANTERIOR CRUCIATE LIGAMENT ANTERIOR HORN OF LATERAL MENISCUS POSTERIOR HORN OF LATERAL MENISCUS POSTERIOR HORN OF MEDIAL MENISCUS POSTERIOR CRUCIATE LIGAMENT LIGAMENTUM PATELLAE

8. MUSCLE ATTACHMENTS ON SHAFT: TIBIALIS ANTERIOR SARTORIUS GRACILIS SEMITENDINOSUS SOLEUS POLITEUS FLEXOR DIGITORUM LONGUS TIBIALIS POSTERIOR DEEP FASCIA OF THE LEG SUPERIOR EXTENSOR RETINACULUM INTEROSSEOUS MEMBRANE INTEROSSEOUS TIBIOFIBULAR LIGAMENT CAPSULAR LIGAMENT OF ANKLE JOINT DELTOID LIGAMENT OF ANKLE JOINT