The question of whether cats possess “buttcheeks” arises from a comparison to human anatomy. The term refers to the prominent, rounded gluteal muscles, particularly the gluteus maximus, which are highly developed in humans for upright posture and walking. To answer this, it is necessary to examine the fundamental differences in skeletal structure and muscle use between a bipedal human and a quadrupedal cat.
The Anatomical Reality
Cats do not possess the robust, horizontally-oriented gluteal maximus muscle that defines the shape of the human posterior. This difference stems from the cat’s quadrupedal stance and locomotion. Humans rely on a large gluteus maximus to maintain stable, upright posture and generate power for bipedal movement.
In a cat, the gluteus maximus is present but is a much smaller, vertically-oriented muscle. This difference in size and alignment means the feline rear lacks the distinct, rounded contours seen in people. The cat’s pelvis is structured for horizontal propulsion, agility, and balance, not for the stability required for walking on two legs.
Feline Musculature and Movement
Since cats lack human-style glutes, the power for their explosive movements comes from other highly developed muscle groups in their hindquarters. The primary force for jumping, pouncing, and sprinting is generated by the large thigh muscles, which are the feline equivalents of our hamstring and quadriceps groups. These muscles provide the strength necessary for a cat to leap over four times its own height.
The powerful extensor muscles of the rear legs straighten the hip, knee, and ankle joints, and are fully activated during a maximal vertical jump. This musculature connects to the pelvis and spine, allowing for characteristic flexibility and rapid force generation. The coordination of these powerful rear legs enables the cat’s signature gait and sudden bursts of speed.
Structures Near the Posterior
A complete look at the feline posterior includes several structures that contribute to the overall shape of the area. The base of the tail, or caudal region, contains significant muscle mass and numerous articulated vertebrae, often up to 20. This muscle mass connects to the pelvis and allows the tail to move with great versatility, aiding in balance and communication.
The feline rear also features two small, pea-sized anal glands, or anal sacs, located on either side of the rectum. These sacs produce a thick, strong-smelling fluid that is typically expressed onto the stool during defecation. The secretion acts as a unique scent signature, which is an important component of communication and territorial marking.