Anatomic spaces Flashcards
Guyon’s canal
- 4 cm long 2. Ulnar n. compression Zone 1- sensory and motor Zone 2- Motor only (runs deep to hook of hamate); Deep motor innervates all interossei, 3rd/4th lumbricals, hypothenar, adductor pol, deep head of FPB Zone 3- Sensory only
Guyon’s borders
Roof- Palmar carpal lig Floor- Transverse carpal lig Radial- Hook of hamate Ulnar- Pisiform/ Pisohamate lig
Shoulder spaces- Quadrilateral space
Borders: Sup- T. minor; Inf.- T. maj; Lateral- humerus; medial- Triceps (long) Contains: ax n. and post hum circumflex At risk during post approach to shoulder if dissecting below T. min
Shoulder spaces- Triangular Space (S for superior)
Borders: Sup- T. min; inf- T. maj; lat- Triceps Contains: Circumflex scapular a.
Shoulder spaces- Triangular Interval (I for inferior)
Borders: Sup- T. maj; medial- Triceps; lat- humerus Contains: Radial n. and profunda brachii
Structures passing thru gt. sciatic notch
(structures below piriformis=POPS IQ) 1. Piriformis 2. Internal Pudendal n. 3. N. to obturator internus 4. Posterior femoral cutaneous n. 5. Sciatic n. 6. Inf gluteal a/ n 7. N. to quadratus
Structures passing thru lesser sciatic notch
- Tendon of obturator internus 2. Nerve to obturator internus 3. Pudendal nerve 4. Internal pudendal artery
Anterior neck triangle borders
SCM, midline of neck, lower border of mandible
![](https://s3.amazonaws.com/brainscape-prod/system/cm/350/011/662/a_image_thumb.png?1625007842)
posterior tarsal tunnel
Medial- laciniate ligament (flexor retinaculum)
Lateral- Talus, calcaneus and sustentaculum tali
Inferior- Abductor hallucis
![](https://s3.amazonaws.com/brainscape-prod/system/cm/350/011/740/a_image_thumb.png?1625009443)