FHC Cat Dissection Superficial Muscles Of The Neck Sternohyoid (#4 Below) #5 is the Sternomastoid! The sternothyroid is beneath the sternohyoid. Sternohyoid Sternomastoid Sternothyroid Sternothyroid Its a deep muscle visible only if the sternohyoid (#5) is cut and reflected! Note that it lies directly atop the trachea! Sternomastoid (#5 Below) Do NOT sever this vessel Sternomastoid Muscles of the Neck A Second View 6. Sternomastoid 4. Sternohyoid 5. Sternothyroid FHC Cat Dissection Superficial Muscles Of The Back and Shoulder Latissimus Dorsi (7) Another View of the Latissimus Dorsi Spinotrapezius Note that the spinotrapezius is shaped like a triangle! Acromiotrapezius A very thin muscle that overlies the supraspinatus. Clavotrapezius Levator Scapulae Ventralis Another View of the Levator Scapulae Ventralis The Deltoid Group In man, the deltoid is one muscle. In a cat, the deltoid is subdivided into three muscles: 1.Spinodeltoid 2.Acromiodeltoid 3.Clavobrachialis (Clavodeltoid) Spinodeltoid Another View of the Spinodelto id Acromiodeltoid Again, the Acromiodeltoid Clavobrachialis Again, the Clavobrachialis Triceps - Lateral Head Triceps - Lateral Head Triceps - Long Head FHC Cat Dissection Superficial Muscles of the Hips, Small of the Back, and Buttocks Semitendinosus (#5 Below) Biceps Femoris Caudofemoralis (#6 Below) Gluteus Maximus (#7 Below) Gluteus Medius Tensor Fascia Latae (#2 Below) The Iliotibial Tract (lower #2) has been pulled back to reveal the Vastus Lateralis (#3) Tensor Fascia Latae - a 2nd View The Iliotibial Tract has been (accidentally) removed! Sartorius (#1 Below) Sartorius - A Second View Im Right Here! FHC Cat Dissection Superficial Muscles of the Anterior Thoracic Region Well Be Looking Right Here! Pectoantebrachialis (#1) Pectoantebrachialis A Second View Pectoralis Major (#2) Pectoralis Minor (#3) Pectoralis Minor A Second View Xiphihumeralis (#4) Linea Alba Its The White Line That Runs The Length Of the Thorax and Abdomen - The Linea Alba Serves As a Site of Separation of Bilaterally Symmetric Muscles! Epitrochlearis Using your mall probe, tease it away from surrounding muscle. Triceps - Long Head Note: The Epitrochlearis is cut and reflected to reveal the long head of the triceps brachii. In Order To View The Next 3 Muscles, You Must Reflect The Latissimus Dorsi Latissimus Dorsi - Reflected Note: The scapula has been pulled away from the body, and you are viewing its undersurface. The muscle bordering the lateral edge (#8) is the teres major and the muscle next to it (#9) is the subscapularis Teres Major (Deep Muscle) In order to view the Teres Major, you must reflect the Latissimus Dorsi. Teres Major - a 2nd View Subscapularis - A Deep Muscle It is Muscle #2 Above! 2 Subscapularis - a 2nd View 5 Serratus Ventralis #1 (Shaped Like a Fan!) In The Illustration Above! Serratus Ventralis - a 2nd View 4 FHC Cat Dissection Superficial Muscles of the Abdominal Region Aponeurosa A thick membrane covering the rectus abdominis muscles. Rectus Abdominis The aponeurosa has been pulled away to reveal the rectus abdominis Rectus Abdominis Muscles of the Abdominal Flank 1.External Abdominal Oblique 2.Internal Abdominal Oblique 3.Transversus Abdominis Where To Make Your Abdominal Muscle Cuts External Abdominal Oblique Postage Stamp Sized! Internal Abdominal Oblique Transversus Abdominis If you can only find 2 muscle layers, you must cut more dorsally! Muscles of the Lower Forelimb Ventral View FHC Cat Dissection Brachioradialis #5 Is The Brachioradialis! NOTE: The cat is lying on its back! Extensor Carpi Radialis The Extensor Carpi Radialis is actually 2 muscles! 6. Extensor Carpi Radialis (Longus) 7. Extensor Carpi Radialis (Brevis) Well separate them when we do the extensors. Flexor Carpi Radialis #9 is the Flexor Carpi Radialis! Flexor Digitorum Profundis You must transect the plamaris longus at its distal end. It is the two-headed muscle that lies beneath! Palmaris Longus Its #10 to the right - the broadest, easiest to locate of the flexors! Flexor Carpi Ulnaris #11 to the right, it is the flexor that overlies the ulna. Run a pin into it and leave it as a point of reference - well use it in identifying the extensors. Biceps Brachii The Epitrochlearis is cut and reflected! Triceps - Medial Head Triceps - M.H. Median Nerve Ulnar Nerve Triceps - L.H. Epitrochlearis - Cut and Reflected The truth isweve already done this. Free Points For All! Pronator Teres FHC Cat Dissection Superficial Muscles of the Upper Forelimb First, you must cut and reflect the Triceps - Lateral Head Triceps - Long Head Yesthis is the Third Time weve seen it! Triceps - Long Head Brachialis Brachialis Triceps - Medial Head Clavobrachialis Clavobrachialis Anconeus Anconeus FHC Cat Dissection Superficial Muscles of the Lower Forelimb - Lateral View Brachioradialis (Again) #1 - A Lateral View of the Brachioradialis! Brachioradialis - a 2nd View! Extensor Carpi Radialis Longus (#2 Below) Extensor Carpi Radialis Longus A Second View (#5 Below) Yes, this is our 2nd View of the Extensor Carpi Radialis! THIS TIME were separating it into the longus and brevis. Extensor Carpi Radialis Brevis (#3 Below) Extensor Carpi Radialis Brevis A 2nd View (#6 Below) Extensor Digitorum Communis (#4) This is often the extensor with the longest tendon. Tendon! Extensor Digitorum Communis A Second View (#7) Extensor Digitorum Lateralis (#5) Extensor Digitorum Lateralis A Second View (#8) Extensor Carpi Ulnaris (#6) Extensor Carpi Ulnaris A Second View (#9) Flexor Carpi Ulnaris This muscle should have a pin still inserted into it from the inspection of the medial foreleg (Muscles Page #6) Flexor Carpi Ulnaris - a 2nd View (#10) Lateral Forelimb Review A - Brachioradialis B - Extensor Carpi Radialis Longus C - Extensor Carpi Radialis Brevis D - Extensor Digitorum Communis E - Extensor Digitorum Lateralis F - Extensor Carpi Ulnaris FHC Cat Dissection Superficial and Deep Muscles of the Hindlimb Tibialis Anterior (#12) Extensor Digitorum Longus (#11) Peroneus Longus (#10) Soleus (#9) Gastrocnemius Biceps Femoris (Cut and Reflected) Semitendinosus (#7) The large nerve visible as #6 is the Ulnar Nerveyoull have to identify it at the end of the dissection! 2-Gluteus Maximus 3-Gluteus Medius 4 - Tensor Fascia Latae Semimembranosus Vastus Lateralis (#5) Adductor Femoris FHC Cat Dissection Superficial Muscles of the Upper Hindlimb - Medial View Sartorius and Gracilis Sartorius Gracilis